Online Editors & Compiler
Online Notepad
Free browser notepad with autosave, multi-note tabs, word/char counts, regex find & replace and download as .txt, .md, .html or .pdf. 100% local.
Online HTML Editor — Live Preview
Free online HTML, CSS and JavaScript editor with instant live preview and multi-file projects. Write and run web code in your browser — no signup, no install, 100% free.
Online Compiler — Python, C++, Java & 85+ Languages
Run Python, C, C++, Java, JavaScript, TypeScript, Go, Rust, PHP, Ruby and 85+ more languages instantly. Interactive stdin, real-time output, fast cloud execution — no setup, no signup.
HCODX Studio — VS Code-Style Online IDE
A VS Code-style web IDE with NPM support, JSX/TSX, live preview and zero setup. Build and ship HTML, React or Vue apps right in the browser — a fast, free CodePen alternative.
Formatters & Beautifiers
JSON Formatter & Validator
Free online JSON formatter, validator and viewer. Pretty-print, fix and inspect JSON with a tolerant parser that explains errors in context.
JavaScript Beautifier Online
Free online JavaScript beautifier — reformat minified, ugly or compressed JS with consistent indentation, spacing and braces.
CSS Beautifier Online
Free online CSS beautifier — expand minified stylesheets back into readable CSS with full control over indentation and selector spacing.
HTML Formatter Online
Free online HTML formatter and beautifier — indent and clean up raw HTML for readable, well-structured markup with preserved attributes.
Prettier Formatter Online
Run Prettier in your browser across JS, TS, JSX, CSS, HTML, JSON, Markdown and YAML with shareable presets — no install, no config.
Code Unminifier Online
Free code unminifier — turn one-line minified JavaScript, CSS or HTML back into well-indented, human-readable code in seconds.
JSON Validator
Validate JSON syntax with line-level errors.
YAML Formatter
Format and validate YAML configs.
XML Formatter
Pretty-print and validate XML.
JSON Pretty Print
Pretty-print JSON with adjustable indent.
JSON5 Formatter
Format and validate JSON5 (with comments and trailing commas).
JSON Beautifier
Beautify and indent JSON for readability.
JSON Prettifier
Pretty-print JSON with consistent formatting.
JSON Syntax Checker
Check JSON for syntax errors with line-by-line feedback.
JSON Lint
Lint JSON to find syntax issues.
YAML Validator
Validate YAML syntax with line-level errors.
YAML Beautifier
Beautify and indent YAML configurations.
XML Validator
Validate XML structure and well-formedness.
XML Beautifier
Beautify and indent XML documents.
SQL Formatter Online
Format SQL for Postgres, MySQL, BigQuery, SQLite, Snowflake and more. Dialect-aware indent, keyword case and tabular output in one click.
JSONPath Tester
Query any JSON with $.store.book[*].title path syntax. Live result preview, recursive descent, filter expressions, value/path/pointer output modes.
Minifiers
JSON Minifier
Strip whitespace, compact JSON to one line.
SVG Optimizer
Shrink SVG markup in your browser. Strips metadata, comments, empty groups and rounds numeric values for smaller, faster icons.
JavaScript Minifier Online
Free online JavaScript minifier — strip whitespace, comments and dead code to ship leaner JS with measurable size savings.
CSS Minifier Online
Free online CSS minifier with structural optimization — merge selectors, drop duplicates and collapse rules for the smallest output.
HTML Minifier Online
Free online HTML minifier — collapse whitespace, drop optional tags and inline-minify embedded CSS and JavaScript safely.
Converters
JSON to CSV / YAML / XML Converter
Convert JSON to and from CSV, YAML, XML and TOML online — structure-preserving round-trips, no upload, instant output.
Color Converter — HEX, RGB, HSL, OKLCH
Free online color converter and picker — translate between HEX, RGB, HSL, HSV and OKLCH with live previews and WCAG contrast checks.
JSON to YAML
Paste JSON, get YAML. Runs entirely in your browser.
YAML to JSON
Paste YAML, get JSON. Runs entirely in your browser.
JSON to XML
Paste JSON, get XML. Browser-only conversion.
XML to JSON
Paste XML, get JSON. No upload required.
JSON to CSV
Convert JSON arrays to CSV. Browser-only.
CSV to JSON
Paste CSV, get JSON. No upload.
JSON to TOML
Paste JSON, get TOML config.
TOML to JSON
Convert Cargo.toml or pyproject.toml to JSON.
YAML to TOML
Convert YAML configs to TOML.
TOML to YAML
Convert TOML configs to YAML.
JSON to INI
Paste JSON, get INI. Browser-only.
INI to JSON
Paste INI, get JSON. Browser-only.
JSON to Properties
Convert JSON to Java .properties format.
Properties to JSON
Convert Java .properties files to JSON.
JSON to Query String
Convert JSON to URL query string.
Query String to JSON
Parse URL query strings to JSON.
JSON to ENV
Convert JSON to .env file format.
ENV to JSON
Parse .env files to JSON.
XML to CSV
Convert XML records to CSV.
CSV to XML
Convert CSV to XML records.
XML to TOML
Paste XML, get TOML. Browser-only.
TOML to XML
Paste TOML, get XML. Browser-only.
CSV to TOML
Paste CSV, get TOML. Browser-only.
TOML to CSV
Paste TOML, get CSV. Browser-only.
YAML to INI
Paste YAML, get INI. Browser-only.
INI to YAML
Paste INI, get YAML. Browser-only.
YAML to Properties
Convert YAML to Java .properties.
Properties to YAML
Convert .properties files to YAML.
JSON5 to JSON
Strip JSON5 comments and trailing commas to plain JSON.
JSON to JSON5
Output JSON in JSON5-compatible form.
JSON to NDJSON
Convert a JSON array to newline-delimited JSON.
NDJSON to JSON
Convert newline-delimited JSON to a JSON array.
cURL to Fetch / Code
Paste a curl command and get clean JavaScript fetch, Node, Axios, Python requests, httpx, or Go net/http code. Parses headers, JSON bodies, forms, basic auth.
Timestamp Converter
Convert between Unix timestamps and human dates.
Encoders & Decoders
Base64 Encoder & Decoder
Free online base64 encoder and decoder — encode or decode text, files and images with full UTF-8 support and instant copy.
Base64 Encode
Encode text or files to base64.
Base64 Decode
Decode base64 back to text or binary.
URL Encode
Percent-encode strings for URLs.
URL Decode
Decode percent-encoded URL strings.
HTML Entity Encode
Escape HTML special characters.
HTML Entity Decode
Decode HTML entities back to characters.
Hex to Text
Decode hex bytes to UTF-8 text.
Text to Hex
Encode text as hex bytes.
Binary to Decimal
Convert binary numbers to decimal.
Decimal to Binary
Convert decimal numbers to binary.
Binary to Hex
Convert binary to hexadecimal.
Hex to Binary
Convert hexadecimal to binary.
Octal to Decimal
Convert octal to decimal.
Decimal to Octal
Convert decimal to octal.
Text to Morse Code
Encode text to International Morse Code.
Morse Code to Text
Decode International Morse Code to text.
Text to ASCII
Convert each character to its decimal codepoint.
ASCII to Text
Convert decimal codepoints back to characters.
Text to Unicode Escape
Convert text to \uXXXX escape sequences.
Unicode Escape to Text
Decode \uXXXX escape sequences back to characters.
Text to Base64
Convert any text to base64-encoded form.
Base64 to Text
Decode base64-encoded data back to readable text.
Base64 Encoder
Online base64 encoder for strings and Unicode.
Base64 Decoder
Online base64 decoder for any base64 string.
URL Encoder
Percent-encode strings for safe URLs.
URL Decoder
Decode percent-encoded URLs back to readable text.
HTML Escape
Escape HTML special characters to entities.
HTML Unescape
Decode HTML entities back to characters.
Image to Base64
Convert images to base64 data URIs.
Base64 to Image
Decode Base64 / data URIs back to images.
Base64 Encoder & Decoder
All-in-one Base64 converter — encode any file or text, decode with auto type detection.
Generators
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text.
Slug Generator
Convert any text into a URL-safe slug.
Fake Data Generator
Generate fake user records as JSON.
QR Code Generator
Generate QR codes from text or URLs.
Text to Slug
Convert any text into a clean URL slug.
Cron Expression Builder
Parse any cron expression to human-readable text and preview the next 10 run times. Quick presets for hourly, daily, weekly and monthly schedules.
Mermaid Live Editor
Edit Mermaid diagram source and see it rendered live. Supports flowchart, sequence, class, state, ER, gantt and pie charts. Export PNG or SVG.
Security & Hashing
AI Text Normalizer
Detect & strip hidden Unicode evasion — tag block, zero-width, BiDi, Zalgo, homoglyphs. Score 0–100.
JWT Decoder
Decode and inspect JWT tokens. No verification.
ROT13
Apply ROT13 cipher to text. Same operation encodes and decodes.
JWT Parser
Parse JWT tokens to inspect headers and claims.
Caesar Cipher
ROT13 — the most common Caesar cipher.
Hash Generator — MD5, SHA-1, SHA-256, SHA-512
Free online hash generator for text and files — MD5, SHA-1, SHA-256, SHA-384 and SHA-512 powered by the native WebCrypto API.
MD5 Hash
Compute MD5 hash of any string.
SHA-256 Hash
Compute SHA-256 hash of any string.
SHA-1 Hash
Compute SHA-1 hash of any text. Native Web Crypto.
SHA-384 Hash
Compute SHA-384 hash. Native Web Crypto.
SHA-512 Hash
Compute SHA-512 hash. Native Web Crypto.
HMAC Generator
Compute HMAC signatures with a secret key.
Bcrypt Verify
Compare a plaintext password against a bcrypt hash.
Password Generator
Generate strong random passwords.
SHA-2 Hash
Generate SHA-2 family hashes (SHA-256 default).
Checksum Generator
Generate checksums for verification (SHA-256).
JWT Generator
Sign JSON Web Tokens in your browser with HMAC-SHA256/384/512. Editable header and payload, base64-url secret support, no network calls.
ID Generators
UUID Generator
Generate UUIDv4 identifiers instantly.
ULID Generator
Generate sortable, lexicographic Universally Unique Lexicographically Sortable Identifiers.
Nano ID Generator
Generate compact URL-safe random IDs.
Random Number Generator
Generate random numbers in a range.
GUID Generator
Generate GUIDs (Microsoft-style UUIDs).
UUID v4 Generator
Generate UUID v4 (random) identifiers.
Random ID Generator
Generate short, URL-safe random IDs.
Calculator Hub — 224 Free Calculators
Calculator Hub
All 42 calculators — financial, fitness, math, date. Single dynamic hub at /calculator.
Mortgage Calculator
Monthly payment, total interest, and full year-by-year amortization for any home loan.
Loan Calculator
Monthly payment and full amortization for personal, auto, or student loans at any APR.
Take-Home Paycheck Calculator
Net pay after federal income tax, FICA, state tax and pre-tax deductions (401k, health). 2026 brackets.
Student Loan Calculator
Federal + private student loan repayment. Standard / extended / graduated plans, deferment capitalization, extra-payment savings.
Rent vs Buy Calculator
Total cost of renting vs buying over N years — mortgage, taxes, maintenance, appreciation, opportunity cost.
Simple Interest Calculator
I = P × r × t. Simple interest (no compounding) for short-term loans, T-bills and bonds.
Present Value Calculator
PV of a future sum or annuity. What is tomorrow's money worth today at a given discount rate?
Future Value Calculator
FV of a lump sum + recurring contributions over time at any compound rate.
ROI Calculator
Total ROI %, total gain and annualized return (CAGR) from start, end value, and holding period.
Budget Calculator
50/30/20 (or custom) split applied to monthly take-home pay — needs, wants, savings in dollars.
House Affordability Calculator
Max home price using 28/36 DTI with income, debts, down payment, taxes, insurance, PMI and HOA.
Down Payment Calculator
Target % of price, PMI threshold, FHA/VA mins, time-to-save with HYSA yield + appreciation drift.
Debt-to-Income (DTI) Calculator
Front + back-end DTI with conventional / FHA / VA program eligibility checks.
FHA Loan Calculator
3.5% min down, 1.75% upfront MIP rolled in, 0.15–0.55% annual MIP. Real PITI with FHA-specific math.
Rental Property Calculator
Cap rate, cash-on-cash return, GRM, 1% rule, monthly cash flow with vacancy + management + CapEx.
VA Loan Calculator
0% down, no PMI, funding fee 1.25–3.30% by service category + prior use. Exempt-rated handled.
Home Equity Loan Calculator
Second-mortgage payment with combined-LTV cap check against existing first mortgage.
Real Estate Calculator
Total cost to buy + hold + sell. Net profit at sale, equity built, annualized ROI on cash invested.
Rent Affordability Calculator
Max rent using the 30% rule (or custom %), with utilities and renter's insurance subtracted.
Personal Loan Calculator
Payment with origination fee folded in. True APR vs advertised rate — bisection-solved.
Auto Lease Calculator
Money factor (MF × 2400 = APR), residual %, cap cost, acquisition fee, state-specific sales-tax mode.
Cash Back vs Low Interest
Auto-financing decision: cash rebate at standard APR vs promotional 0%/low APR with no rebate. Total cost winner.
Social Security Calculator
PIA from AIME with 2026 bend points. Early/delayed adjustments for any claim age 62–70. Benefit-by-age table.
Annuity Payout Calculator
Monthly payout from an annuity balance — fixed period or lifetime mode using actuarial life expectancy.
IRA Calculator
Traditional IRA projection with 2026 $7k limit ($8k 50+), auto catch-up, 4% safe withdrawal estimate.
RMD Calculator
Required Minimum Distribution using the 2024 IRS Uniform Lifetime Table. 7-year projection at 5% growth.
Marriage Tax Calculator
MFJ vs two singles using 2026 federal brackets. Reveals the marriage penalty or bonus for your combined incomes.
Estate Tax Calculator
Federal estate tax with 2026 exemption ($13.99M / $27.98M MFJ), 40% top rate, optional state overlay, sunset toggle.
Bond Calculator
Bond price from YTM, or YTM from price (bisection). Current yield, accrued interest, premium/par/discount status.
Mutual Fund Calculator
Growth with expense ratio drag, optional front-load. See how 0.75% fee eats 25%+ of your final balance over 30 yrs.
Average Return Calculator
Arithmetic vs geometric mean of a return series. Reveals volatility drag — the gap that makes "10% avg" become 7% CAGR.
IRR Calculator
Internal Rate of Return (Newton-Raphson). NPV at chosen hurdle. Cash-flow table with PV per period.
Payback Period Calculator
Simple + discounted payback period. Cumulative recovery table for every year.
Debt Consolidation Calculator
Combine multiple debts into one loan. Before vs after monthly + interest savings, with origination fee factored in.
Loan Repayment Calculator
Compare standard, extra-monthly, biweekly, and lump-sum strategies. Interest + months saved for each.
College Cost Calculator
Project 4-year college cost at 5% tuition inflation. Compare against current 529 balance + contributions. Funding gap shown.
Depreciation Calculator
4 methods side-by-side: SL, DDB, SYD, and MACRS (5/7/15-year property classes with half-year convention).
Business Loan Calculator
SBA 7(a) with full guarantee-fee schedule (2.0–3.75% by loan size), origination, monthly payment, 25-yr terms.
Boat Loan Calculator
Boat or RV financing — 10-20 year terms, sales tax, registration. Total cost of ownership as % of price.
Commission Calculator
Flat-rate or 3-tier commission with base salary support. OTE breakdown + effective commission rate.
Credit Card Calculator
Reveals the minimum-payment trap: 22 yrs / $5,200 interest on $5k at 25% APR. Fixed-amount alternative comparison.
Percent Error Calculator
|exp − actual| / |actual| × 100. Plus percent difference, signed error, and the verification ratio.
Half-Life Calculator
Solve any variable in N(t) = N₀(½)^(t/T½). Decay constant λ, mean lifetime τ, fraction remaining.
Ratio Calculator
Simplify A:B via GCD, scale by k, or solve A:B = C:? proportions.
Root Calculator
n-th root of any number. Handles negatives correctly (odd roots), flags complex cases.
Factor Calculator
All factors (divisors) of n with factor pairs, σ(n) sum, and perfect/abundant/deficient classification.
Rounding Calculator
7 rounding modes including banker's half-even, half-away-from-zero, floor, ceiling, truncate.
Matrix Calculator
Add / subtract / multiply matrices up to 4×4, transpose, determinant, and 2×2 / 3×3 inverse.
Scientific Notation Calculator
Convert standard ↔ scientific (with configurable sig figs), plus + − × ÷ on two scientific-form values.
Big Number Calculator
Arbitrary-precision integer arithmetic via BigInt. + − × ÷ mod power GCD LCM on integers of ANY size.
Number Sequence Calculator
Arithmetic, geometric, or Fibonacci sequences. nth term and sum of first n in closed form.
Sample Size Calculator
Cochran's n = Z²pq/E² with finite-population correction. Six confidence levels supported.
Probability Calculator
P(A∪B), P(A∩B), P(A|B), P(A'). Independence + mutually-exclusive checks.
Statistics Calculator
Mean, median, mode, range, variance, SD (sample & pop), Q1, Q3, IQR, skewness, SEM, CV.
Z-Score Calculator
z = (x − μ)/σ → percentile via Abramowitz-Stegun CDF. Plus one-tail and two-tail p-values.
Confidence Interval Calculator
z-CI (known σ), t-CI (Hill approx for any df), and Wald proportion CI. 80/90/95/99% supported.
Area Calculator
10 shapes: circle, rectangle, triangle (3 ways inc. Heron's), trapezoid, parallelogram, ellipse, sector, regular polygon.
Volume Calculator
8 solids — cube, rectangular prism, cylinder, cone, sphere, pyramid, ellipsoid, capsule. Liter / gallon / ft³ conversions.
Surface Area Calculator
Surface area of 8 solids including Knud Thomsen approximation for ellipsoid. Lateral SA for cylinder, cone, pyramid.
Right Triangle Calculator
Solve from any 2 inputs. Sides, angles, area, perimeter, altitude to hypotenuse, in/circum-radius, sin/cos/tan.
Time Card Calculator
Weekly timesheet with lunch deduction and 1.5× OT after 40 hr (FLSA default, configurable). Gross-pay total.
Time Zone Calculator
Convert wall-clock time across 12 major IANA zones. DST handled automatically via the browser's TZ database.
Time Duration Calculator
Calendar breakdown (yr/mo/d/h/m/s) + totals in every unit (years, weeks, days, hours, minutes, seconds).
Day Counter
Calendar days + business days (excludes weekends and 10 US federal holidays with proper observed dates).
Day of the Week
Weekday + day-of-year + ISO week number + days from today + zodiac sign + leap-year flag.
BTU Calculator
AC or heater sizing in BTU/hr. Adjusts for sq ft, ceiling, sun, occupants, kitchen, climate zone. Tonnage shown.
Square Footage Calculator
Rectangle, triangle, circle or L-shape. Input ft / in / m / cm / yd. Output in sq ft, sq m, sq yd, acres.
Stair Calculator
Per US IRC code: max riser 7-3/4", min tread 10", 2R+T 24-25" comfort check. Stringer length + stair angle.
Roofing Calculator
Roof area from footprint + pitch (√(1 + (rise/12)²)). Squares, bundles (3/sq), waste factor, cost estimate.
Mulch Calculator
Cubic yards and 2-cu-ft bag count for any garden bed. Bulk vs bagged cost comparison.
Gravel Calculator
Tons + cubic yards. 7 material density presets (crushed, pea, river, limestone, dust, sand, custom).
Bra Size Calculator
Modern direct-measurement method (band = underbust to nearest even). US / UK / EU / AU conversions.
Shoe Size Conversion
US Men / US Women / UK / EU / JP / AU. Mondopoint (mm) pivot ensures consistent cross-system conversion.
Golf Handicap Calculator
World Handicap System (2020+). Differentials from scores + course rating/slope. Best N of 20 averaging.
Height Converter
Convert height between cm, ft/in, meters, and inches with population percentile.
GDP Calculator
Gross Domestic Product via the expenditure method: GDP = C + I + G + (X − M). Per-capita + growth.
Density Calculator
Density, mass, or volume using ρ = m/V with multi-unit support (g/cm³, kg/m³, lb/ft³).
Mass Calculator
Solve mass from weight (W=mg), force (F=ma), density (m=ρV), or relativistic energy (E=mc²).
Weight on Other Planets
Your weight on the Moon, Mars, Jupiter, and every solar-system body using real surface gravity.
Speed Calculator
Solve speed = distance/time with mph/kph/m·s/knots conversion and race-pace output.
Molarity Calculator
Molarity (mol/L) from mass + MW + volume; includes dilution (C₁V₁ = C₂V₂) and serial dilution.
Molecular Weight Calculator
Molar mass from any chemical formula. Supports parentheses, hydrates, all 92 natural elements.
Wind Chill Calculator
Apparent temperature from cold + wind using the NWS 2001 formula. Frostbite risk timetable included.
Heat Index Calculator
Apparent temperature from heat + humidity using the NWS/Rothfusz regression — official US standard.
Dew Point Calculator
Dew point from temperature and relative humidity using the Magnus formula. Comfort scale included.
Voltage Drop Calculator
Wire voltage drop using NEC Chapter 9 Table 8 resistance. Single + three-phase, AWG + metric.
Resistor Color Code
4-band, 5-band, and 6-band resistor color codes with tolerance and TCR. IEC 60062 standard.
Ohm's Law Calculator
Solve any 2 of V, I, R, P using Ohm's law and power formulas (P = VI = I²R = V²/R).
Electricity Cost Calculator
Electricity cost from wattage + hours + rate. Hourly/daily/monthly/yearly + CO₂ at US grid average.
Bandwidth Calculator
File download time from connection speed, plus monthly data usage from streaming/gaming hours.
Fuel Cost Calculator
Trip fuel cost with MPG / L-per-100km. Includes an EV cost comparison at 16¢/kWh, 3.5 mi/kWh.
Horsepower Converter
Convert horsepower between HP, PS, kW, W, and ft·lbs/s with mechanical and metric conventions.
Engine Horsepower Calculator
Engine HP from torque and RPM via HP = T × RPM / 5252. Peak-torque + forced-induction estimator.
Mileage Calculator
Gas mileage (MPG or L/100km), trip cost, miles, or gallons — solves any variable.
Tire Size Calculator
Decode P-metric tire sizes (e.g., P225/65R17). Diameter, revs/mile, speedometer error on upsize.
Dice Roller
Roll dice (d4–d100) with full RPG notation (3d6+2). Reproducible seeded PRNG.
Love Calculator
Classic FLAMES game with a letter-frequency compatibility percentage. Just for fun.
Healthy Weight Calculator
Healthy range using BMI 18.5–24.9 plus Hamwi, Devine, Robinson, and Miller IBW formulas.
Calories Burned Calculator
40+ activities using the MET formula: kcal/min = MET × kg × 3.5 / 200.
Pregnancy Conception Date
Conception date from due date (EDD − 266) or LMP + 14 days using Naegele's rule.
Carbohydrate Calculator
Daily carbs from TDEE using IOM AMDR (45–65%) plus keto, low-carb, and moderate presets.
Fat Intake Calculator
Daily fat using IOM AMDR (20–35%) + USDA <10% and AHA <6% saturated caps + omega-3 ALA.
TDEE Calculator
Total Daily Energy Expenditure (Mifflin-St Jeor BMR × activity). Cut and bulk targets included.
GFR Calculator
eGFR via CKD-EPI 2021 race-free creatinine equation — current US clinical standard.
Body Type (Somatotype)
Ectomorph / mesomorph / endomorph from wrist circumference and height. Frame-adjusted IBW.
Body Surface Area (BSA)
BSA using all 5 major formulas (Mosteller, DuBois, Haycock, Boyd, Gehan-George). Oncology dosing.
BAC Calculator
Blood alcohol content via the Widmark formula (1932). Hours to sober + intoxication level.
Dog Age Calculator
Dog years to human years using AVMA size-adjusted method + 2020 DNA methylation formula.
Cat Age Calculator
Cat years to human years using AAFP/AAHA formula (15 + 9 + 4/yr) and 6 life stages.
Countdown Calculator
Days, hours, minutes & seconds until any future date — birthdays, holidays, deadlines.
Anniversary Calculator
Time elapsed since a milestone + next anniversary date and traditional gift suggestions.
Tip Split Calculator
Split a bill between any number of people — even or uneven — with US-standard tipping.
Wedding Budget Calculator
Per-category wedding budget breakdown using The Knot 2024 industry percentages.
Net Worth Calculator
Assets − liabilities, with US percentile from Federal Reserve SCF 2022 by age group.
Tax Bracket Calculator
2025 US federal marginal & effective rate by filing status with bracket-by-bracket detail.
Pay Raise Calculator
Percentage or flat-dollar raise impact on hourly, weekly, monthly & annual pay — after tax.
Capital Gains Tax
2025 US short-term vs long-term (0/15/20%) capital gains tax + 3.8% NIIT for high earners.
Self-Employment Tax
2025 Schedule SE: 15.3% SE tax on $176,100 SS cap + 0.9% Additional Medicare for high earners.
Income Percentile
Where your US household / individual income ranks against Census 2024 (P60-286) data.
Crypto Profit Calculator
Bitcoin / Ethereum / any crypto P&L with fees + US capital-gains tax (short vs long-term).
Cost of Living
Compare 40+ US and European cities — equivalent salary for the same purchasing power.
National Insurance (UK)
UK 2025/26 NI — Class 1 (8/2%), Class 4 (6/2%), employer 15% above £5K. HMRC official rates.
Inheritance Tax (UK)
UK 2025/26 IHT — NRB £325k + RNRB £175k with £2m taper, 40% (36% with 10% charity).
Dividend Tax (UK)
UK 2025/26 dividend tax — £500 allowance + 8.75% / 33.75% / 39.35% bracket-stacked.
PAYE Calculator (UK)
UK 2025/26 take-home pay — tax 20/40/45%, NI 8/2%, student loans (all plans), Scotland option.
Corporation Tax (UK)
UK 2025/26 CT — 19% small profits (≤£50k), 25% main (≥£250k), marginal relief between (26.5%).
Auto Loan Calculator
Monthly car payment with sales tax, down payment and trade-in factored in. Full schedule.
Interest Calculator
Simple vs compound interest side-by-side. Pick yearly, quarterly, monthly or daily compounding.
Payment Calculator
Solve for the monthly payment of any fixed-rate loan from amount, APR and term.
Retirement Calculator
Project your retirement nest egg from current savings, monthly contributions and expected return.
Amortization Calculator
Generate a complete year-by-year amortization schedule for any fixed-rate loan.
Investment Calculator
Future value of a lump sum + monthly contributions at a given annual return.
Inflation Calculator
CPI-adjusted purchasing power across years at any inflation rate. Forward or backward.
Finance Calculator
Time-value-of-money (TVM) solver — compute PV, FV or PMT from the other variables.
Mortgage Payoff Calculator
See how much interest and time you save with extra monthly principal payments.
Income Tax Calculator
US federal income tax estimate using 2025 brackets. Marginal & effective rate, take-home.
Compound Interest Calculator
Daily, monthly, quarterly or yearly compounding with optional regular contributions.
Salary Calculator
Convert hourly, weekly, biweekly, monthly or annual pay between formats.
Interest Rate Calculator
Given loan amount, monthly payment and term, solve for the implied APR.
Sales Tax Calculator
Add sales tax to a price or reverse-engineer the pre-tax amount from a total.
BMI Calculator
Body Mass Index in metric (cm/kg) or imperial (in/lb). WHO category & healthy weight range.
Calorie Calculator
Daily calorie needs (TDEE) using the Mifflin-St Jeor formula plus activity multiplier.
Body Fat Calculator
Estimate body fat % using the US Navy circumference method (neck, waist, height, hip).
BMR Calculator
Basal metabolic rate using Mifflin-St Jeor, Harris-Benedict or Katch-McArdle.
Ideal Weight Calculator
See IBW from Devine, Robinson, Miller, Hamwi plus the BMI healthy weight range.
Pace Calculator
Running pace (min/km or min/mi), speed and projected 5K/10K/marathon times.
Pregnancy Calculator
Week-by-week pregnancy tracker from LMP. Trimester, due date, conception estimate.
Conception Calculator
Estimate the date of conception from due date or LMP at any cycle length.
Due Date Calculator
Estimated delivery date (EDD) using Naegele’s rule (LMP + 280 days) with cycle adjustment.
Army Body Fat Calculator
US Army AR 600-9 body fat percentage with age & sex pass/fail thresholds.
Scientific Calculator
Online scientific calculator with sin/cos/tan, log/ln, √, ^, !, π, e — DEG/RAD modes.
Fraction Calculator
Add, subtract, multiply, divide fractions — simplified result, mixed number & decimal.
Percentage Calculator
Five percentage operations — X% of Y, X is what %, change %, increase, decrease.
Random Number Generator
Random integers in any range. Optional unique mode and cryptographic (CSPRNG) source.
Triangle Calculator
Solve all three angles, area (Heron) and inradius from three side lengths (SSS).
Standard Deviation Calculator
Mean, median, range, sample/population standard deviation, variance and standard error.
Age Calculator
Exact age in years, months, days, hours, minutes and seconds from any birth date.
Date Calculator
Add or subtract days from a date, or compute the difference between two dates.
Time Calculator
Add or subtract hours, minutes and seconds. Convert any duration into total units.
Hours Calculator
Hours between a start and end time with optional unpaid break subtraction.
GPA Calculator
Weighted GPA on the US 4.0 scale (with +/− grades) from letter grades and credit hours.
Grade Calculator
Find what you need on the final exam to reach a target course grade.
Concrete Calculator
Concrete volume for slabs and cylindrical columns in cubic yards and cubic meters.
Subnet Calculator
IPv4 subnet — enter IP/CIDR for network, broadcast, mask, usable host range and count.
Password Generator
Strong cryptographically-secure random passwords with custom length and character set.
Conversion Calculator
Unit converter for length, weight, volume and temperature between metric and imperial.
Tip Calculator
Bill split + gratuity at any tip %, round up cleanly, multi-currency.
Macro Calculator
Daily protein, carbs and fat targets from TDEE for cut/maintain/bulk.
Ovulation Calculator
Most fertile days + estimated ovulation date from LMP and cycle.
Quadratic Equation Solver
ax² + bx + c = 0 roots, discriminant, vertex, parabola.
Slope Calculator
Slope, distance, angle and equation of a line from two points.
MPG Calculator
Fuel economy in MPG (US/UK) or L/100 km, cost per mile, CO₂.
401(k) Calculator
Project retirement savings with employer match + IRS 2025 limits.
Water Intake Calculator
Daily hydration in oz/L based on weight, activity, climate.
Sleep Calculator
Best bedtime to wake refreshed based on 90-min sleep cycles.
Heart Rate Calculator
Max HR + 5 training zones (Karvonen method, 4 formulas).
Discount Calculator
Sale price after % off, savings %, stacked discounts.
Debt Payoff Calculator
Snowball vs avalanche method for paying off multiple debts.
Savings Goal Calculator
How long to save a target, or monthly amount to hit goal by date.
Tax Refund Estimator
US federal refund (or owed) from W-2 income — 2025 brackets + CTC.
VAT Calculator
UK 20% / 5% / 0% + EU rates — add or remove VAT.
Distance Formula Calculator
Euclidean distance between 2 points (2D/3D) + Manhattan + midpoint.
Midpoint Calculator
Midpoint of any line segment in 2D or 3D using the midpoint formula.
Pythagorean Theorem Calculator
a² + b² = c² solver for any side of a right triangle.
Factorial Calculator
n! computation up to 170, plus Stirling approximation.
Combinations Calculator (nCr)
n choose r — pick r items from n where order doesn't matter.
Permutations Calculator (nPr)
n permute r — ordered arrangements of r items from n.
GCD Calculator
Greatest common divisor (HCF) of 2+ numbers via Euclidean algorithm.
LCM Calculator
Least common multiple of 2+ numbers.
Prime Factorization Calculator
Decompose any integer into prime factors + divisor list.
Logarithm Calculator
log base 10, ln, log base 2, or any custom base.
Exponent Calculator
x^y for any base and exponent. Plus e^x and 10^x.
Circle Calculator
Area, circumference, diameter, radius from any one input.
Rectangle Calculator
Area, perimeter, diagonal + golden-ratio check.
Sphere Calculator
Volume V = (4/3)πr³ + surface area S = 4πr².
Cylinder Calculator
Volume V = πr²h + lateral and total surface area.
Roth IRA Calculator
Tax-free retirement growth with 2025 IRS contribution limits.
Refinance Calculator
Compare current mortgage to refinance — break-even + savings.
HELOC Calculator
Available equity + interest-only draw + repayment phase.
CD Calculator
Certificate of Deposit final value + early-withdrawal penalty.
Credit Card Payoff Calculator
Months and interest to pay off credit cards at any payment.
Annuity Calculator
Present value, future value, payment — ordinary or annuity-due.
APR Calculator
True APR including all fees and discount points.
Lease Calculator
Auto lease monthly using dealership money-factor math.
Break-Even Point Calculator
Units + revenue needed to cover fixed + variable costs.
Profit Margin Calculator
Gross margin, net margin + markup % from cost and price.
Markup Calculator
Selling price from cost + markup, or markup % from price.
Stamp Duty Calculator (UK)
UK SDLT 2025/26 with FTB relief + 5% additional-property surcharge.
Pension Calculator (UK)
UK workplace pension + State Pension £11,973/yr at age 67.
Period Calculator
Predict next 6 menstrual cycles + ovulation + fertile windows.
Lean Body Mass Calculator
LBM + fat mass from 4 formulas (body-fat / Boer / James / Hume).
Gas Cost Calculator
Trip fuel cost from distance, MPG and price — split between passengers.
Paint Calculator
Gallons of paint needed for a room + estimated cost.
Tile Calculator
Tiles + grout + cost for any floor or wall project, with waste %.
Roof Pitch Calculator
Pitch (x/12) ↔ angle ↔ slope % + rafter length.
Roman Numeral Converter
Arabic ↔ Roman numerals (1–3,999,999) with vinculum support.
Mean, Median, Mode Calculator
Mean, median, mode, range + geometric/harmonic means + std dev.
Final Grade Calculator
Score needed on the final exam to hit a target course grade.
Test Grade Calculator
Percentage + letter grade from correct/total with 4 grading scales.
Protein Intake Calculator
Daily protein target in grams with food equivalents.
Max Heart Rate Calculator
4 MHR formulas compared (Fox, Tanaka, Gulati, Nes).
One Rep Max (1RM) Calculator
5 formulas (Epley, Brzycki, Lander, Lombardi, O'Conner) + lift % table.
VO₂ Max Calculator
Aerobic fitness from 1-mile run, Cooper test, or resting HR.
Pregnancy Weight Gain Calculator
Recommended weight gain by week using IOM 2009 guidelines.
Currency & Finance
Currency Converter
Live exchange rates between USD, EUR, GBP, JPY, INR, AED, SAR, PKR, CAD, AUD, BTC, ETH and any major world currency. Updated daily, no signup, no ads.
USD to EUR Exchange Rate
Convert US Dollar to Euro with the latest live exchange rate. See 1 USD in EUR today.
EUR to USD Exchange Rate
Convert Euro to US Dollar with the latest live exchange rate. See 1 EUR in USD today.
USD to GBP Exchange Rate
Convert US Dollar to British Pound with the latest live exchange rate. See 1 USD in GBP today.
GBP to USD Exchange Rate
Convert British Pound to US Dollar with the latest live exchange rate. See 1 GBP in USD today.
USD to JPY Exchange Rate
Convert US Dollar to Japanese Yen with the latest live exchange rate. See 1 USD in JPY today.
JPY to USD Exchange Rate
Convert Japanese Yen to US Dollar with the latest live exchange rate. See 1 JPY in USD today.
USD to INR Exchange Rate
Convert US Dollar to Indian Rupee with the latest live exchange rate. See 1 USD in INR today.
INR to USD Exchange Rate
Convert Indian Rupee to US Dollar with the latest live exchange rate. See 1 INR in USD today.
USD to AED Exchange Rate
Convert US Dollar to UAE Dirham with the latest live exchange rate. See 1 USD in AED today.
AED to USD Exchange Rate
Convert UAE Dirham to US Dollar with the latest live exchange rate. See 1 AED in USD today.
USD to SAR Exchange Rate
Convert US Dollar to Saudi Riyal with the latest live exchange rate. See 1 USD in SAR today.
SAR to USD Exchange Rate
Convert Saudi Riyal to US Dollar with the latest live exchange rate. See 1 SAR in USD today.
USD to PKR Exchange Rate
Convert US Dollar to Pakistani Rupee with the latest live exchange rate. See 1 USD in PKR today.
PKR to USD Exchange Rate
Convert Pakistani Rupee to US Dollar with the latest live exchange rate. See 1 PKR in USD today.
USD to CAD Exchange Rate
Convert US Dollar to Canadian Dollar with the latest live exchange rate. See 1 USD in CAD today.
CAD to USD Exchange Rate
Convert Canadian Dollar to US Dollar with the latest live exchange rate. See 1 CAD in USD today.
USD to AUD Exchange Rate
Convert US Dollar to Australian Dollar with the latest live exchange rate. See 1 USD in AUD today.
AUD to USD Exchange Rate
Convert Australian Dollar to US Dollar with the latest live exchange rate. See 1 AUD in USD today.
USD to CNY Exchange Rate
Convert US Dollar to Chinese Yuan with the latest live exchange rate. See 1 USD in CNY today.
CNY to USD Exchange Rate
Convert Chinese Yuan to US Dollar with the latest live exchange rate. See 1 CNY in USD today.
USD to BTC Exchange Rate
Convert US Dollar to Bitcoin with the latest live exchange rate. See 1 USD in BTC today.
BTC to USD Exchange Rate
Convert Bitcoin to US Dollar with the latest live exchange rate. See 1 BTC in USD today.
USD to ETH Exchange Rate
Convert US Dollar to Ethereum with the latest live exchange rate. See 1 USD in ETH today.
ETH to USD Exchange Rate
Convert Ethereum to US Dollar with the latest live exchange rate. See 1 ETH in USD today.
EUR to GBP Exchange Rate
Convert Euro to British Pound with the latest live exchange rate. See 1 EUR in GBP today.
GBP to EUR Exchange Rate
Convert British Pound to Euro with the latest live exchange rate. See 1 GBP in EUR today.
JSON to Code
JSON to TypeScript
Generate TypeScript interface from JSON. Browser-only.
JSON to Go
Generate Go struct from JSON. Browser-only.
JSON to Rust
Generate Rust struct from JSON. Browser-only.
JSON to Python dataclass
Generate Python dataclass from JSON. Browser-only.
JSON to Pydantic
Generate Python Pydantic model from JSON. Browser-only.
JSON to Java
Generate Java POJO class from JSON. Browser-only.
JSON to Java record
Generate Java record from JSON. Browser-only.
JSON to Kotlin
Generate Kotlin data class from JSON. Browser-only.
JSON to C#
Generate C# class from JSON. Browser-only.
JSON to C# record
Generate C# record from JSON. Browser-only.
JSON to Swift
Generate Swift Codable struct from JSON. Browser-only.
JSON to C++
Generate C++ struct from JSON. Browser-only.
JSON to PHP
Generate PHP class from JSON. Browser-only.
JSON to Ruby
Generate Ruby class from JSON. Browser-only.
JSON to Ruby Struct
Generate Ruby Struct from JSON. Browser-only.
JSON to Dart
Generate Dart class from JSON. Browser-only.
JSON to Scala
Generate Scala case class from JSON. Browser-only.
JSON to Crystal
Generate Crystal struct from JSON. Browser-only.
JSON to Zig
Generate Zig struct from JSON. Browser-only.
JSON to Elm
Generate Elm type alias from JSON. Browser-only.
JSON to F#
Generate F# record from JSON. Browser-only.
JSON to Haskell
Generate Haskell data type from JSON. Browser-only.
JSON to Elixir
Generate Elixir struct from JSON. Browser-only.
JSON to TypeScript Interface
Generate TypeScript interfaces from JSON.
JSON to Go Struct
Generate Go structs with json tags from JSON.
JSON to TypeScript Type
Generate TypeScript types from JSON.
JSON to Go Types
Generate Go struct types from JSON.
JSON to Rust Struct
Generate Rust structs with serde derive.
JSON to Python Class
Generate Python @dataclass classes from JSON.
AI Utilities
GPT-4o Token Counter
Count tokens for OpenAI GPT-4o.
GPT-4o mini Token Counter
Count tokens for GPT-4o mini.
GPT-5 Token Counter
Count tokens for GPT-5.
OpenAI o1 Token Counter
Count tokens for OpenAI o1 reasoning model.
Claude Opus 4.7 Token Counter
Count tokens for Anthropic Claude Opus 4.7.
Claude Sonnet 4.6 Token Counter
Count tokens for Claude Sonnet 4.6.
Claude Haiku 4.5 Token Counter
Count tokens for Claude Haiku 4.5.
Gemini 2.5 Pro Token Counter
Count tokens for Google Gemini 2.5 Pro.
Llama 3.3 Token Counter
Count tokens for Meta Llama 3.3 70B.
Grok Token Counter
Count tokens for xAI Grok 4, 4.3, 4.20, 4.1 Fast.
Grok Cost Calculator
Estimate xAI Grok 4 / 4.3 / 4.1 Fast API spend.
Mistral Token Counter
Count tokens for Mistral Large 2, Medium 3, Small 3, Codestral.
Mistral Cost Calculator
Estimate Mistral AI API spend (Large 2, Medium 3, Small 3, Codestral).
Prompt Caching Calculator
Calculate Anthropic Claude prompt caching savings (5-min / 1-hour TTL).
MCP Server Config Generator
Build MCP JSON for Claude Desktop, Cursor, Zed, Continue.
DeepSeek V3 Token Counter
Count tokens for DeepSeek V3.
GPT-4o Cost Calculator
Calculate cost for GPT-4o API calls.
GPT-4o mini Cost Calculator
Calculate cost for GPT-4o mini.
GPT-5 Cost Calculator
Calculate cost for GPT-5 API calls.
Claude Opus 4.7 Cost Calculator
Calculate cost for Anthropic Claude Opus 4.7.
Claude Sonnet 4.6 Cost Calculator
Calculate cost for Claude Sonnet 4.6.
Claude Haiku 4.5 Cost Calculator
Calculate cost for Claude Haiku 4.5.
Gemini 2.5 Pro Cost Calculator
Calculate cost for Google Gemini API.
Llama 3.3 Cost Calculator
Calculate cost for Llama 3.3 (via Together, Groq, etc.).
DeepSeek V3 Cost Calculator
Calculate cost for DeepSeek V3 API.
LLM Cost Comparison
Compare cost for the same prompt across all major LLMs.
Prompt Token Diff
Compare two prompts to see token & cost difference.
Context Window Visualizer
See how much of each model's context window your prompt fills.
Prompt Cleaner
Strip zero-width chars, smart quotes, NBSPs from prompts.
System Prompt Extractor
Extract the system prompt from messages JSON.
Markdown Compactor
Strip excess whitespace from markdown to save tokens.
Prompt Template Variables
Render {{variables}} in prompt templates from JSON.
Function Calling Converter
Convert between OpenAI, Anthropic, and Gemini tool/function-calling formats.
Schema to Tool
Wrap a JSON Schema as an OpenAI/Anthropic/Gemini tool definition.
AI Text Similarity Detector
Detect AI paraphrasing & semantic similarity with a 5-layer pipeline (USE + pHash equivalents for text).
AI Image Similarity Detector
Compare two images with MobileNet deep features, pHash, SSIM, color histogram & MSE — WebGL + WASM.
System Prompt Formatter
Reformat system prompts in Anthropic XML, numbered rules, or sectioned style.
OpenAI Token Counter
Approximate token count for OpenAI models.
Anthropic Token Counter
Approximate Claude token count.
LLM Token Counter
Token count comparison across all major LLMs.
AI Cost Calculator
Compare AI API costs across all major LLMs.
GPT Cost Calculator
Estimate OpenAI GPT API call costs.
Claude Cost Calculator
Estimate Anthropic Claude API costs.
AI Text Humanizer
Rewrite AI text into natural human voice. Cloud + local LLM.
AI Detector
Check if any text is AI-generated. Per-paragraph highlighting with a confidence score for each section.
Text Summarizer AI
Extractive / abstractive / hybrid summaries with sentiment & keywords.
Text to Speech
Instant in-browser TTS with system voices, plus high-quality MP3 downloads via 8 OpenAI-style voices (alloy, echo, fable, onyx, nova, shimmer, coral, sage). Free, no signup.
AI Image Generator
Free, unlimited, no signup. Generate images with Flux, GPT Image, Kontext, NanoBanana, Seedream and Turbo via the open Pollinations.ai network. No watermark, no API key.
AI Background Remover Pro
The pro editor: two AI models (Fast portrait + High accuracy general), refine brush with undo/redo, edge feather, de-spill, smart crop, image / gradient backgrounds, drop shadow. 100% local.
AI Image Upscaler
Real-ESRGAN super-resolution — 2× / 4× enhance any photo. WebGL + WASM accelerated TensorFlow.js, tile-based for huge images, before/after slider, PNG / JPG / WebP export. No upload, no signup, no watermark.
AI Text Watermark Remover
Strip invisible Unicode watermarks, Markdown decorations and custom chars from ChatGPT / Claude / Gemini output — ZWSP, ZWNJ, Word Joiner, BOM, bidi marks, `**bold**`, `#`, emoji and any char or regex you choose.
Claude Skill Builder
Generate Claude SKILL.md scaffolds with YAML frontmatter (name, description, allowed-tools) and structured sections. 7 templates, live preview, validation, download.
ChatGPT Conversation Exporter
Turn your OpenAI conversations.json export into clean Markdown, PDF, HTML, JSON or .txt files. Bulk download as ZIP. 100% in-browser.
Diff & Compare
Text Diff Checker
Compare two texts and see line-by-line differences.
JSON Diff
Compare two JSON objects with structural diff.
YAML Diff
Compare two YAML configurations structurally.
XML Diff
Compare two XML documents.
Code Diff Checker Online
Free online code diff checker — compare two snippets side-by-side with line-level highlights, word diffs and copy-ready output.
Text Tools
Case Converter
Convert text between 11 different cases.
Word Counter
Count words, characters, sentences, and paragraphs.
Character Counter
Count characters with social media limits.
Line Counter
Count total, non-empty, and empty lines.
Reverse Text
Reverse text character by character.
Sort Lines
Sort lines of text alphabetically.
Deduplicate Lines
Remove duplicate lines from text.
Trim Whitespace
Strip extra whitespace from text.
Find and Replace
Replace text within a document.
Text Cleaner
Strip hidden chars and normalize whitespace.
Regex Tester
Test regular expressions against any text in the browser. Live highlight, capture-group table, all six flags, replace mode with $1..$9 backrefs.
Fancy Text Generator
Turn plain text into bold, italic, cursive, bubble, monospace, strikethrough, and 20+ other Unicode styles for Instagram, TikTok, X, and Discord bios.
Word Explorer
Synonyms, rhymes & related words with definitions and frequency.
English Dictionary
Definitions, IPA pronunciation, audio, synonyms, antonyms & rhymes — instant lookup.
Syllable Counter
syllable.js + CMU dictionary, with 6 readability scores and a haiku helper.
CSS Generators
CSS Gradient Generator
Generate CSS gradients with live preview.
Box Shadow Generator
Build CSS box-shadow with live preview.
Border Radius Generator
Generate CSS border-radius with per-corner control.
Text Shadow Generator
Build CSS text-shadow with live preview.
CSS clamp() Generator
Build responsive CSS clamp() values.
CSS Specificity Calculator
Calculate CSS specificity for any selector. Live breakdown of inline, ID, class and type counts plus which rule wins. Handles :is, :not, :where, :has.
PX to REM Converter
Convert pixels to rems and back instantly, with custom base font size, precision control, and a live conversion table for common type and spacing values.
CSS Animation Generator
Build CSS @keyframes animations with a visual editor and live preview. Pick presets, tweak duration, easing, delay, and iterations. Copy ready-to-paste CSS.
Markdown
Color Tools
HEX to RGB
Convert HEX color codes to RGB.
RGB to HEX
Convert RGB color values to HEX.
HSL to HEX
Convert HSL colors to HEX.
Color Picker
Pick colors and see all formats at once.
WCAG Contrast Checker
Check WCAG 2.1 contrast ratio between two colors. Live AA / AAA pass/fail for normal and large text with a sample preview on real colors.
Network & IP
CIDR Calculator
Calculate network, broadcast, and host ranges from CIDR notation.
IP ↔ Integer
Convert IPv4 addresses to integers and back.
IPv4 to IPv6
Convert IPv4 addresses to IPv6 mapped notation.
MAC Address Generator
Generate random MAC addresses.
Subnet Calculator
Calculate IPv4 subnet ranges from CIDR.
IP Converter
Convert IPv4 addresses between decimal, hex, and binary.
What's My IP
Show your public IPv4 and IPv6, ISP/ASN, city/country, timezone and browser fingerprint. ipify + ipapi. No tracking, no signup.
DNS Lookup
Resolve A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, SRV, PTR records via Google or Cloudflare DoH. Compare resolvers side-by-side.
WHOIS Lookup
Domain registrar, IANA ID, creation/expiry dates, name servers, DNSSEC, EPP status codes — via the modern RDAP protocol. No signup.
Ping Test
In-browser HTTPS latency to any URL with min, average, max and jitter. Presets for Google, Cloudflare, GitHub, AWS, OpenAI.
Internet Speed Test
Measure download / upload Mbps and latency / jitter against Cloudflare's global edge. No third-party tracking, no signup.
SSL Checker
SSL Labs grade A+ to F, certificate chain, expiry, protocol and cipher support for any domain. publish=off keeps your scan private.
HTTP Header Viewer
Inspect status, response headers, final URL and security headers (HSTS, CSP, X-Frame-Options, Referrer-Policy) for any URL.
User Agent Parser
Decode browser, version, engine, OS and device from any UA string. Pre-filled with your own UA. ua-parser-js, 100% browser.
Broken Link Checker
Crawl any page or paste a list — every dead link (4xx, 5xx, DNS error, timeout) with source page, anchor text and status. CSV export.
SEO Tools
SERP Analyzer — Top 10 Google Results
Analyse the top 10 Google results in seconds — title length, meta description, URL structure, domain authority, SERP features. Free SEO tool, no signup.
Long-Tail Keyword Suggester
Enter any seed keyword and get 100+ ranked long-tail ideas grouped by intent — informational, commercial, comparison. SEO research in your browser, no signup.
Free Image Finder — CC & Stock Search
Search 7 free-license stock photo sources at once — Unsplash, Pixabay, Openverse, Wikimedia, Library of Congress. License + commercial-use shown for every result. No signup.
XML Sitemap Generator & Validator
Build a Google-ready sitemap.xml from a list of URLs, or paste an existing sitemap and validate it against the sitemaps.org protocol.
robots.txt Generator
Modern robots.txt with AI-crawler directives — GPTBot, ClaudeBot, Google-Extended, PerplexityBot — and SEO-scraper blocks (AhrefsBot, SemrushBot).
llms.txt & ai.txt Generator
Make your site AI-friendly for ChatGPT, Claude, Gemini and Perplexity. Generates llms.txt, llms-full.txt, or ai.txt in seconds.
Redirect Checker
Trace the full HTTP redirect chain for any URL — 301, 302, 307, 308 — every hop with status code, headers and timing. Bulk mode + Googlebot UA.
AI Plagiarism Checker
Compare two texts for copying and paraphrasing — runs locally.
PDF & Document Tools
PDF Merge
Combine multiple PDF files into one — entirely in your browser. Drag to reorder, customize the filename, set metadata. No upload, no watermark, no signup.
PDF Split
Split a PDF into ranges, extract specific pages, or burst one page per file — locally in your browser. Custom ranges, every-N, or per-page modes. No upload.
PDF Compressor
Shrink image-heavy PDFs by re-encoding pages as JPEG at a chosen quality and DPI. Browser-only, no upload. Best for scans and image-rich documents.
Rotate PDF
Rotate one page, selected pages or every page 90°, 180° or 270° and save the rotation permanently. Batch up to 50 files. 100% browser, no upload.
Add Watermark to PDF
Add a text watermark (DRAFT, CONFIDENTIAL) or stamp every page with your PNG/JPG logo. Opacity, color, rotation, 9 position presets. No upload.
Sign PDF
Draw, type or upload your signature and place it on any page. Drag to reposition, resize, multi-page. Browser-only e-signature. No upload, no signup.
Unlock PDF
Remove the open password and owner restrictions from PDFs. Restriction-only PDFs keep text; password-protected PDFs are rebuilt as image-based PDF. No upload.
Protect PDF
Add a password and lock printing, copying, editing or annotations. AES-128 encryption, separate user / owner passwords. 100% browser. No upload, no signup.
PDF OCR
Extract text from scanned PDFs or rebuild them as searchable PDFs with an invisible text layer. 100+ languages via Tesseract.js. No upload.
Edit PDF
Drag to reorder pages, delete or rotate individual pages, insert blank pages, add text annotations. Undo / redo. 100% browser. No upload.
PDF to Word
Convert PDF to editable DOCX. Per-page paragraph extraction, page breaks preserved, page-range support. Powered by PDF.js + docx. No upload.
Word to PDF
Convert .docx to PDF preserving paragraphs, headings, lists, basic tables and inline images. A4 or Letter, portrait or landscape. No upload.
PDF to Excel
Extract tables from PDF into XLSX with auto row and column detection. One sheet per PDF page. CSV export available. No upload.
Excel to PDF
Convert XLSX, XLS or CSV to PDF with auto page break, styled header row, every sheet. A4 / Letter, portrait or landscape. No upload.
PDF to PowerPoint
Every PDF page becomes a high-resolution PPTX slide. Widescreen 16:9, standard 4:3 or match-page mode. Opens in PowerPoint, Keynote, Google Slides. No upload.
Image to PDF
Combine JPG, PNG, WebP, and HEIC images into one PDF. Drag to reorder, choose page size, orientation, and margins. Local-only, no upload.
PDF to Image
Render every PDF page as JPG, PNG, or WebP at a chosen DPI. Page-range support and ZIP download. Pure browser via PDF.js, no upload.
PDF Viewer Online
Open any PDF in your browser — drag & drop, page nav, zoom, full-text search, thumbnails, print. No Acrobat. PDF.js, 100% in-browser.
Word Doc Viewer
Open .docx files in your browser — no Microsoft Word. Headings, lists, tables, images. Export to HTML, Markdown or .txt. mammoth.js, 100% local.
Excel Viewer Online
Open .xlsx, .xls, .csv, .tsv, .ods in your browser. Sheet tabs, search, sort, range stats, export CSV / JSON / HTML / .xlsx. SheetJS, no upload.
Image & Media
EXIF Viewer & Stripper
Inspect every EXIF, GPS, IPTC, and XMP tag a camera or phone embedded in your photos — and strip metadata cleanly before sharing. JPEG, HEIC, PNG, TIFF, WebP.
Image Compressor
Shrink JPEG, PNG, and WebP images in your browser. Adjustable quality, max width, output format. Batch up to 50 files with side-by-side size savings.
Image Converter
Convert between JPG, PNG, WebP, AVIF, HEIC, GIF, BMP, ICO, SVG & TIFF in your browser. Batch up to 50 files, quality slider, optional resize, EXIF stripped. No upload.
HEIC Converter
Convert iPhone .heic and .heif photos to JPG, PNG, or WebP. Batch up to 50 files, quality control, optional resize. Powered by libheif. No upload.
WebP Converter
Convert WebP images to JPG or PNG. Batch up to 50 files, quality control, optional resize. Native browser decoding, no upload, no signup.
Signature Maker
Draw or type your signature in your browser. Adjust pen color, thickness, and font. Download as transparent PNG, JPG, or SVG. No upload, no signup.
Background Remover
AI-powered background removal in your browser using the MODNet model and Transformers.js. Transparent PNG, color fill, or custom background. No upload, no signup.
Image to Text (OCR)
Extract text from any image — 100+ languages — entirely in your browser using Tesseract.js. Per-line confidence scores, copy to clipboard, or download as .txt.
Video to MP3
Extract audio from MP4, WebM, MOV, MKV, AVI & more — MP3, WAV, OGG, M4A or FLAC, up to 320 kbps, optional trim. Runs in the browser via FFmpeg.wasm — nothing uploaded.
Video to GIF
Convert MP4, WebM, MOV & MKV into high-quality animated GIFs in your browser. FPS, width, palette quality, trim — all local. Best mode uses per-frame palette via FFmpeg.wasm.
Image Resizer
Resize PNG, JPG, WebP, GIF, BMP & SVG to any dimension. 11 social presets (Instagram, FB, YT, OG…), aspect-lock, EXIF-aware. Browser-side, no upload.
Image Cropper
Interactive crop region with 8 drag handles, aspect locks (1:1, 16:9, 4:5…), 90° rotate and H/V flip. PNG / JPG / WebP output. Browser-side, no upload.
Image Analysis Lab
Forensic-grade image inspector. ELA, full EXIF/IPTC/XMP/ICC metadata, AI/deepfake CNN detection, histograms, JPEG quantization tables, PNG chunks, FFT magnitude, edge maps, LSB stego, perceptual hash, pixel magnifier, side-by-side diff — plus our unique Divergence Panel that fuses classical + CNN forensics. 100% local.
YouTube Thumbnail Downloader
All 9 sizes — HD, 4K, SD, HQ & frame stills, JPG / WebP.
Utilities
.htaccess Generator Online
Free online .htaccess generator — build Apache rules visually for redirects, rewrites, headers, caching and access controls.
Favicon Generator
Create favicons from text or letters.
Emoji Picker
Find and copy emojis with codepoints.
HTTP Status Codes
Look up any HTTP status code with its name, category and use case. Searchable table covering RFC 9110 plus WebDAV, 425 and 451.
Website Screenshot
Capture any URL as PNG or JPG. Custom viewport (desktop / iPad / iPhone), full-page mode, dark / light scheme. microlink.io powered.
.gitignore Generator
Combine official github/gitignore templates for Node, Python, Java, Rust, Go, macOS, Windows, JetBrains and 200+ more stacks. No signup.
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