IMPORTANT — READ BEFORE USING THIS SITE
- FREE SERVICE, NO CHARGES, EVER: HCODX is and will remain completely free to use. There are no fees, subscriptions, per-use charges, paywalls, premium tiers, or hidden costs of any kind — now or in the future — for any browser-based tool, calculator, code editor, AI utility, document viewer, converter, generator, or any other feature on the site.
- NO ACCOUNTS OR UPLOADS: No registration, login, or file uploads are required or available. Everything runs locally inside your web browser. You cannot and do not provide personal data to us through normal use of the tools.
- TOOL OUTPUT — NO WARRANTY: The output of every tool on the site — calculators, formatters, converters, AI detectors, financial estimates, medical-related metrics, code generators, document viewers and all others — is provided "AS IS" on a best-effort basis. We make no guarantee whatsoever that any output is accurate, complete, current, or suitable for any purpose.
- NOT PROFESSIONAL ADVICE: Nothing on this site — including any calculator result, tool output, FAQ entry, "About" text, or chart — constitutes financial, tax, legal, medical, veterinary, accounting, engineering, or other professional advice. Always consult a qualified licensed professional before making any decision that affects your money, health, taxes, business, or wellbeing.
- NO LIABILITY, ZERO DAMAGES: We are NOT liable for ANY damages — including loss of data, loss of revenue, financial loss, tax penalties, medical outcomes, business losses, or any other damages — whether direct, indirect, incidental, consequential, special, punitive, or exemplary — arising from your use of, or reliance on, anything on this site.
- ADS & THIRD-PARTY COOKIES: The site is supported by third-party advertising and analytics. Ads and tracking are served by independent networks under their own policies that we do not control.
- HARD DAMAGES CAP: Our maximum aggregate liability to any person, for any cause whatsoever, is USD $0.00 (zero dollars).
1. About HCODX
HCODX ("we," "us," "our," "the Service," "the Site," or "the Platform") is a free, browser-based web platform available at hcodx.com. The Service provides a full set of free tools across the following categories:
- Calculators: Financial (mortgage, loan, retirement, tax bracket, capital gains, self-employment tax, income tax, sales tax, VAT, inheritance tax, dividend tax, corporation tax, PAYE, national insurance, net worth, pay raise, cost of living, crypto profit, income percentile, and many more); fitness & health (BMI, BMR, TDEE, calorie, body fat, ideal weight, pregnancy, due date, ovulation, heart rate, BAC, GFR, BSA, lean body mass, water intake, sleep, pace, and others); math (scientific, fraction, percentage, triangle, statistics, quadratic, prime factorization, etc.); date/time (age, date, time, anniversary, countdown, day-counter, day-of-week, etc.); pets (dog-age, cat-age); and other utility calculators.
- Code editors & compilers: HTML/CSS/JavaScript editor with live preview, VS-Code-style online IDE, multi-language online compiler.
- Formatters & beautifiers: JSON, JS, CSS, HTML, XML, YAML, etc.
- Minifiers, converters, encoders, decoders: Base64, JSON↔CSV/YAML/XML/TOML, color converter, image converter, currency converter, unit converter, URL encoder, etc.
- Generators: UUID, ULID, password, hash (MD5, SHA-family, HMAC, bcrypt), QR code, favicon, fake data, .htaccess, robots.txt, sitemap, gitignore, and others.
- AI utilities: AI text detector, AI text humanizer, token counters and cost calculators for GPT/Claude/Gemini/Llama/Mistral/DeepSeek/Grok, prompt utilities, function-calling converters, prompt caching estimator, and others.
- JSON-to-code generators: many target languages including TypeScript, Go, Rust, Python (dataclass / Pydantic), Java, Kotlin, C#, Swift, etc.
- Diff & compare tools: Text, JSON, code diff.
- Document & image viewers: PDF viewer, Word/Excel viewer, EXIF viewer, image analysis, background remover, image lab.
- Network, security, SEO, CSS, markdown, color, and other developer utilities.
All tools run entirely within your browser using client-side JavaScript and WebAssembly. No code, input, output, calculation, file, or content is transmitted to or stored on our servers in connection with tool operation. We have no access to anything you compute, type, paste, view, generate, or process on this site.
2. No Accounts — No Personal Information Required
HCODX does not offer user accounts, registration, login, or any authentication mechanism. You do not provide us with any personal information to use any feature of this site. Because there are no accounts:
- There is no account to create, modify, or delete
- There is no profile, username, password, or saved data associated with your use
- We have no way to identify, contact, or track individual users beyond standard anonymous analytics
- "Termination" of your use simply means you stop visiting the site
3. Free Service — No Charges, No Hidden Fees, No Paywalls
HCODX is provided entirely free of charge. There are no subscription fees, premium tiers, per-use charges, "pro" plans, transaction fees, in-tool purchases, or any other fees, now or in the future, for the use of any tool, calculator, editor, viewer, generator, or utility on this site.
The Service is funded by third-party advertising revenue and we commit to keeping the core functionality of every tool free indefinitely. We will never lock features behind a paywall, charge per calculation, or require payment information for any reason.
4. Advertising
HCODX displays advertisements served by independent third-party advertising networks (such as Google AdSense) to support the free operation of this service. By using HCODX, you acknowledge and agree that:
- Advertisements may appear on any page of this site, including alongside tool interfaces and results
- Ads are provided, selected, ranked, and served entirely by third-party networks — not by HCODX
- We do not endorse any advertiser or any product or service advertised on this site
- We are not responsible for the accuracy, quality, safety, legality, or content of any advertisement or advertised product or service
- Any transaction you enter into with an advertiser is solely between you and that advertiser — HCODX is not a party to it and has no responsibility for it
- Third-party advertising networks may set cookies and collect data in accordance with their own privacy policies, which we do not control
- Ad-blocking software is your choice; however, we encourage you to support free tools through ad viewing if possible
5. Tool Output — General Disclaimer
CRITICAL — ALL TOOL OUTPUT IS "AS IS": Every tool, calculator, generator, converter, formatter, viewer, editor, detector and utility provided by HCODX — without exception — is provided on a best-effort basis only. We make no representation or warranty that:
- Tool output is accurate, current, complete, or free of errors
- Calculator results are correct for any specific situation, jurisdiction, or moment in time
- Minified or formatted code is functionally equivalent to your input
- Validator or detector results reflect all applicable standards, specifications, or ground truth
- Tool output is suitable for use in any production, commercial, professional, regulated, or safety-critical application
- Tool output complies with any law, regulation, professional standard, or industry practice
You are solely responsible for reviewing, testing, validating, and verifying every tool output before relying on it for any purpose. We are not liable for any damages, losses, errors, missed deadlines, regulatory penalties, or any other harm arising from reliance on tool output.
5a. Financial Calculators — NOT Financial Advice
The financial calculators on HCODX — including but not limited to mortgage, loan, auto loan, retirement, investment, compound interest, inflation, amortization, salary, tax bracket, capital gains, self-employment tax, income tax, sales tax, VAT, tip, discount, debt payoff, savings, tax refund, refinance, HELOC, CD, credit card, annuity, APR, lease, ROI, budget, house affordability, rent vs buy, FHA loan, VA mortgage, Roth IRA, IRA, 401(k), pension, social security, RMD, marriage tax, estate tax, inheritance tax, dividend tax, PAYE, national insurance, corporation tax, net worth, pay raise, cost of living, crypto profit, income percentile, and all others — are educational and illustrative only.
They are NOT financial advice, NOT tax advice, NOT legal advice, NOT investment advice, and NOT accounting advice. Results depend on rates, brackets, allowances and rules that change frequently and vary by jurisdiction, tax year, filing status, personal circumstances, and other factors we do not know about you. We make no warranty that:
- Tax brackets, thresholds, allowances, rates, or reliefs used in the calculation are current for your tax year, your country, or your specific situation
- The calculation reflects the latest law, statute, regulation, IRS / HMRC / equivalent guidance, judicial decision, or administrative practice
- The result is correct for your actual filing, return, mortgage application, loan agreement, retirement plan, or any other real-world financial decision
- The calculator covers all deductions, credits, exemptions, reliefs, allowances, surcharges, additional taxes, or special rules that apply to you
Before making any financial, tax, investment, lending, or borrowing decision based even partially on output from HCODX, you must consult a licensed financial advisor, certified tax professional, qualified accountant, attorney, or other appropriate licensed professional in your jurisdiction. We are not licensed financial professionals and provide no professional service.
HCODX is not a registered investment adviser, broker-dealer, tax preparer, accountant, attorney, mortgage lender, loan originator, or any other regulated financial entity in any jurisdiction.
5b. Health, Fitness, Medical & Pregnancy Calculators — NOT Medical Advice
The health, fitness, medical, body-metric and pregnancy-related calculators on HCODX — including but not limited to BMI, BMR, TDEE, calorie, body fat, body surface area (BSA), ideal weight, healthy weight, lean body mass, army body fat, macro, carbohydrate, fat intake, protein, water intake, sleep, pace, heart rate, max heart rate, one rep max (1RM), VO₂ max, GFR (eGFR), BAC (blood alcohol content), calories burned, body type, pregnancy, due date, ovulation, conception, period, pregnancy weight, pregnancy conception date, and all similar tools — are for general educational, illustrative, and entertainment purposes only.
They are NOT medical advice, NOT clinical assessment, NOT diagnostic, NOT a substitute for professional medical care, and NOT a replacement for consultation with a qualified physician, registered dietitian, licensed nurse, midwife, OB-GYN, sports physician, sleep specialist, or other healthcare professional.
Results from these calculators:
- Use simplified statistical formulas that do not account for individual medical history, conditions, medications, athletic training status, body composition, ethnicity, age extremes, pregnancy complications, or any other relevant factor
- Are population-level estimates and may be substantially wrong for any individual person
- Should never be used to diagnose, treat, cure, prevent, or self-manage any disease, condition, deficiency, pregnancy complication, or health outcome
- Should never be used to determine medication dose, including but not limited to chemotherapy dosing (despite the inclusion of BSA formulas commonly used clinically)
Always consult a qualified healthcare professional licensed in your jurisdiction before making any health, fitness, dietary, pregnancy, or medical decision. If you may have a medical emergency, contact emergency services immediately. Do not rely on this site for medical decisions.
5c. BAC (Blood Alcohol Content) Calculator — SAFETY WARNING
⚠ BAC CALCULATOR — DO NOT USE TO DECIDE WHETHER TO DRIVE OR OPERATE MACHINERY
The BAC calculator is for education only. Real blood-alcohol concentration varies by individual metabolism, food intake, hydration, medications, genetics, fatigue, drinking pace, beverage proof, body composition and many other factors that the Widmark formula does not capture. Calculator output can be off by ±0.05% BAC or more compared to a measured reading.
Under no circumstances should the output of this calculator (or any calculator on this site) be used to:
- Decide whether to drive a motor vehicle, ride a motorcycle, fly an aircraft, operate a boat, or operate any other vehicle or machinery
- Decide whether to perform any task requiring sober judgement or coordination
- Defend, dispute, or excuse any DUI / DWI / OWI / drink-driving charge, citation, or accident
- Make any other safety-critical decision
If you have been drinking, do not drive. Period. Take a taxi, rideshare, designated driver, or public transport. HCODX disclaims all responsibility for any decision made in reliance on the BAC calculator or any other calculator on this site.
5d. AI Tools — Accuracy Not Guaranteed
The AI-related tools on HCODX — including but not limited to AI Detector, AI Text Humanizer, AI Text Normalizer, token counters, cost calculators for GPT/Claude/Gemini/Llama/Mistral/DeepSeek/Grok, prompt-caching calculators, context window visualizers, function-calling converters, and all similar tools — are for educational, exploratory, and informational use only.
In particular, the AI Detector tool is known to be unreliable, as are all AI-detection tools currently on the market. AI detectors regularly produce both false positives (flagging human-written text as AI-generated) and false negatives (missing actual AI-generated text). Results should never be used to:
- Accuse any student, employee, writer, journalist, researcher, or other person of academic dishonesty, cheating, plagiarism, fraud, or misrepresentation
- Make hiring, firing, grading, admissions, publication, disciplinary, or any other consequential decision about any person
- Make legal, contractual, regulatory, or compliance determinations
Token counts and cost estimates from our AI cost calculators are estimates only. Actual model pricing, tokenization, billing, and usage are determined by the AI provider (OpenAI, Anthropic, Google, Meta, etc.) and may differ from our calculations at any time. Verify with the provider's official pricing page before relying on any cost number for procurement, budgeting, or billing.
5e. Pet Age Calculators — NOT Veterinary Advice
The dog age and cat age calculators are for general educational and entertainment purposes only. They use generalized formulas (AVMA size-adjusted method, AAFP/AAHA life-stage model, DNA methylation studies) that approximate population averages and do not reflect any individual pet's actual biological age, health status, or wellbeing.
These calculators are NOT veterinary advice and are NOT a substitute for examination by a licensed veterinarian. For any concern about your pet's health, age-related care, diet, vaccinations, or treatment, consult a licensed veterinarian.
5f. Code Editors, Compilers, and Document Viewers
The HCODX code editors, online compilers, PDF/Word/Excel viewers, image viewers and similar tools execute or display content that you provide. You are solely responsible for the legality, safety, ownership, and accuracy of any code, document, image, or other content you load into these tools. The cloud-based code compiler executes user-supplied code in sandboxed third-party infrastructure under that provider's own terms; you may not use it to attack, abuse, mine, scrape, exfiltrate data from, or otherwise misuse any external system.
5g. Unit Converter, Color Converter and Reference Data
Unit conversion factors, color-space conversions, currency exchange rates, country/jurisdiction-specific reference values (tax brackets, NI thresholds, allowances, COL indexes, percentile data, etc.), and all other numerical references shown on this site are presented for educational and illustrative purposes. We use the best public source we are aware of at the time of writing, but rates and references change. Verify with the official primary source (IRS, HMRC, Federal Reserve, US Census Bureau, ONS, BIPM, NIST, ISO, etc.) before relying on any number for a regulated, contractual, or financial purpose.
6. Acceptable Use
You agree to use HCODX only for lawful purposes. You agree NOT to use the service to:
- Violate any applicable local, national, or international law or regulation
- Create, distribute, or test malicious code, viruses, malware, ransomware, exploit kits, phishing kits, or any harmful software
- Mine cryptocurrency, run distributed compute, or otherwise abuse browser execution
- Infringe the intellectual property rights of any third party
- Attempt to probe, scan, or test the vulnerability of our systems or any system reached via our tools
- Use the online compiler to attack, abuse, scrape, or exfiltrate data from any external system
- Interfere with or disrupt the integrity or performance of the service
- Use automated tools to scrape, crawl, or systematically download content
- Engage in ad fraud, including fraudulent clicking or automated ad impressions
- Use the AI Detector or any other AI tool to make consequential decisions about any third party (academic, employment, immigration, legal, financial, etc.) — see Section 5d
- Misrepresent calculator output as professional financial, tax, medical, legal, or veterinary advice given to third parties
We reserve the right to block access to users or IP addresses engaging in prohibited conduct without notice or liability.
7. Your Code and Content
- You retain full ownership of all code, text, data, files, and content you create or process with HCODX
- HCODX claims no rights, ownership, license, or interest over your code or content
- Because tool input and output are not transmitted to our servers, we have no access to your code, files, calculator inputs, or outputs
- You are solely responsible for backing up your work; we provide no backup, sync, save, or storage service
- You are solely responsible for ensuring your code, files, and data comply with applicable laws and do not infringe third-party rights
8. Intellectual Property
The HCODX platform, its design, its branding, its trademarks, and its original content (excluding third-party libraries and your code/content) are protected by intellectual property laws. You may not:
- Copy, reproduce, mirror, or redistribute the HCODX platform or its interface
- Use HCODX trademarks, logos, or branding without prior written permission
- Reverse engineer the service beyond what is permitted by applicable law
- Scrape, harvest, or republish substantial portions of the site content
Third-party open-source libraries used within HCODX are subject to their respective licenses.
9. Service Availability
- The service may be unavailable due to maintenance, technical issues, third-party CDN outages, or circumstances beyond our control
- We may modify, suspend, or discontinue any part of the service at any time without notice or liability
- We may add, change, or remove tools, calculators, formulas, reference data, or features at our sole discretion
- Cached calculator output, reference data, and rates may become outdated; we do not commit to any update schedule
10. Disclaimers — No Warranties
TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW:
- HCODX IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT ANY WARRANTY OF ANY KIND
- WE EXPRESSLY DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, TITLE, NON-INFRINGEMENT, AND ANY WARRANTY THAT ANY CALCULATION OR OUTPUT IS CORRECT, CURRENT, OR APPLICABLE TO YOUR JURISDICTION OR SITUATION
- WE DO NOT WARRANT THAT THE SERVICE WILL MEET YOUR REQUIREMENTS, BE UNINTERRUPTED, OR BE FREE OF DEFECTS
- WE DO NOT WARRANT THAT ANY ERRORS OR DEFECTS WILL BE CORRECTED
- YOUR USE OF THE SERVICE IS ENTIRELY AT YOUR OWN RISK
11. Limitation of Liability
TO THE FULLEST EXTENT PERMITTED BY LAW: IN NO EVENT SHALL HCODX, ITS OWNERS, OPERATORS, AFFILIATES, OR CONTRIBUTORS BE LIABLE FOR ANY:
- Direct, indirect, incidental, special, consequential, punitive, or exemplary damages
- Loss of data, revenue, profits, savings, goodwill, business opportunity, or income
- Tax penalties, interest charges, fines, audit costs, or other regulatory or legal costs arising from reliance on a calculator output
- Medical outcomes, missed diagnoses, injury, illness, pregnancy outcomes, or any other health-related harm arising from reliance on health calculators or other site content
- Damages arising from reliance on tool output, calculator results, AI detector classifications, financial estimates, tax estimates, or any other site content
- Damages arising from third-party advertisements, advertiser conduct, or any transaction with an advertiser
- Damages arising from third-party service interruptions (CDNs, ad networks, analytics, AI providers, compiler infrastructure)
- Any other damages of any nature whatsoever
THIS LIMITATION APPLIES REGARDLESS OF THE LEGAL THEORY UNDER WHICH SUCH DAMAGES ARE SOUGHT, AND EVEN IF WE HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. OUR MAXIMUM AGGREGATE LIABILITY IS USD $0.00 (ZERO DOLLARS).
12. Indemnification
You agree to indemnify, defend, and hold harmless HCODX and its owners, operators, affiliates, and agents from and against any claims, liabilities, damages, losses, costs, and expenses (including reasonable legal and attorneys' fees) arising out of or related to:
- Your use or misuse of the service or any tool, calculator, editor, or utility on the site
- Code, content, files, or data you create, upload, process, or generate using the service
- Any decision you, or any person acting on information you share, makes in reliance on a calculator result, tool output, or any other content on this site
- Your violation of these Terms
- Your violation of any applicable law, regulation, or professional standard
- Your infringement of any third-party right
- Your use of the AI Detector or other AI tools to make consequential decisions about any third party
13. Third-Party Services
HCODX integrates or links to third-party services including CDNs (Cloudflare, jsDelivr, cdnjs), analytics providers (Google Analytics), advertising networks (Google AdSense and others), and cloud compiler infrastructure. These services:
- Operate under their own terms of service and privacy policies
- Are not under our control — we are not responsible for their conduct, availability, accuracy, or data practices
- May change or become unavailable, which may affect features of HCODX
Any links to external websites are provided for convenience only. We do not endorse linked sites and are not responsible for their content.
14. DMCA — Copyright
HCODX respects intellectual property rights. Because no user content is transmitted to or stored on our servers, DMCA safe harbor provisions as they relate to stored user content do not directly apply. However, if you believe any content on hcodx.com itself (not user-generated code) infringes your copyright, please contact us:
DMCA Contact: dmca@hcodx.com
Please include: your contact information, a description of the copyrighted work, the URL of the allegedly infringing content, a statement of good-faith belief, and your electronic signature.
15. Age Requirements
- You must be at least 13 years old (or the minimum age in your jurisdiction) to use HCODX
- EU/UK residents must be at least 16 years old, or have parental consent (or the lower age set by their member state)
- Users under 18 should use the service with parental awareness and permission
- Schools and educators may use HCODX for classroom instruction under their own supervision and at their own risk; HCODX disclaims responsibility for any classroom outcome, grade, disciplinary action, or other consequence
16. Changes to These Terms
We may update these Terms at any time and at our sole discretion. The updated effective date will be reflected at the top of this page. Continued use of the service after changes constitutes acceptance of the revised Terms. If you do not agree to updated Terms, discontinue use of the service.
17. Governing Law and Disputes
These Terms are governed by, and construed in accordance with, the laws applicable to the operator of HCODX, without regard to conflict-of-law provisions. Any dispute arising from these Terms or your use of the service shall be resolved through good-faith negotiation first. If negotiation fails, disputes shall be submitted to binding individual arbitration rather than court proceedings, to the maximum extent permitted by applicable law. You waive any right to participate in class action, collective action, or representative proceedings against HCODX. Any claim must be brought within one (1) year of the event giving rise to the claim, or be permanently barred.
18. Severability
If any provision of these Terms is found invalid or unenforceable, that provision shall be severed and the remaining provisions shall remain in full force and effect.
19. Entire Agreement
These Terms of Service, together with our Privacy Policy and Cookie Policy, constitute the entire agreement between you and HCODX regarding your use of the service, superseding any prior agreements.
20. Contact
Legal inquiries: legal@hcodx.com
DMCA / copyright: dmca@hcodx.com
Website: https://hcodx.com
Response time: We aim to respond within 5 business days.
These Terms of Service are effective as of the date listed above and govern all use of HCODX at hcodx.com, including every tool, calculator, editor, compiler, viewer, AI utility, generator and any future tools added to the site.