AI Text Humanizer — turn AI-generated text into natural human voice
Paste any AI draft and the humanizer sends each chunk to a free AI rephrasing model (Pollinations.ai, no API key) for a natural rewrite, then applies hidden-character injection, punctuation randomization and a lowercase-first ending. Four voice styles, chunk-size slider, side-by-side highlight of every change. Free, no signup, no key.
Humanizing…
0%When to humanize AI text
For polishing AI drafts into your own voice, reducing false-positive flags on legitimate human writing, and avoiding the formulaic vocabulary clusters detectors look for.
Polish AI drafts
Take a ChatGPT or Claude first draft and make it sound less templated before publishing.
Content marketing
Vary the vocabulary across a batch of AI-assisted articles so they don't all read identically.
Reduce false positives
Strip unicode tells and AI-cliché vocabulary from human writing that detectors mis-flag.
Email & outreach
Turn ChatGPT-style outreach into something that reads like you actually wrote it.
ESL / non-native polish
Smooth over translation-style phrasing into natural conversational English.
Detector R&D
Test how your own AI-detector or content classifier handles humanized text.
How to humanize AI-generated text (3 steps)
Paste or upload your text
Drop AI-generated text into the editor, or upload a TXT, DOCX or PDF. Extraction runs locally — nothing is uploaded to a server.
Pick intensity and voice
Choose Light, Medium or Strong rewrites, then a voice — Neutral, Casual, Formal or Conversational. Toggle individual passes (cliché filter, contractions, burstiness, synonym swap, unicode).
Humanize and review
Click Humanize. Hover any highlighted word in the output to see the original. Copy or download when you're happy with the result.
Frequently asked questions
Yes. 100% free, ad-free, no signup, no daily limits.
Optional unicode pre-clean, then the text is split into sentence-respecting chunks (default 120 words). Each chunk is sent to Pollinations.ai's free text API with a "rephrase naturally, preserve meaning" system prompt and a random seed for variation. After rephrasing, common short words get U+200B zero-width spaces between letters, punctuation runs through a randomization map, and the first letter is lowercased with a trailing ellipsis for a casual voice. No API key needed.
In most cases yes — detectors look for low burstiness, missing contractions, formal vocabulary clusters and unicode tells, all of which the humanizer addresses. No tool can promise 100%: detectors update and accuracy varies. Use the Strong setting for best results, and always re-read for awkward phrasing.
Use it responsibly. Polishing your own AI drafts, reducing false positives, and adapting AI output into your voice are legitimate. Submitting humanized AI text where the policy requires disclosure or where AI is prohibited (most academic assignments, some journalism) is dishonest. Always follow your institution's rules.
The AI rephrase pass sends each chunk to Pollinations.ai's free text API (no API key, marked private: true so the request isn't published in the public feed). File extraction (DOCX, PDF) and all other passes happen locally. Disable "AI rephrase" if you want the tool to run fully offline — you'll still get hidden-character injection and punctuation randomization.
Yes. Upload TXT, DOCX (via Mammoth) or PDF (via PDF.js) — extraction runs entirely in your browser.
Up to 5,000 words per run. For longer documents, split into sections. Processing yields to the event loop so the page stays responsive.
Yes — semantic meaning is preserved. The humanizer rewrites surface features (vocabulary, rhythm, punctuation), not facts. Always review the diff before publishing.
About this AI text humanizer
HCODX's AI Text Humanizer is a free, ad-free, no-signup tool that rewrites AI-generated text into more natural human voice. It pairs a free AI rephrasing API (Pollinations.ai) with three local post-passes so the output reads less like a model and more like a person.
The pipeline
- Unicode pre-clean (optional) — NFC-normalises, strips zero-width spaces, BOMs and curly quotes before rephrasing.
- Chunking — splits the input into sentence-respecting blocks of about 120 words (slider, 60–220) so each API call stays under timeout and adds variety per chunk.
- AI rephrase (Pollinations.ai) — each chunk goes to the free
text.pollinations.aiendpoint with a tone-tuned system prompt and a random seed. Falls back to the original chunk on any network error so the run never stops mid-document. - Zero-width injection — inserts U+200B between letters of common short words (
a, it, the, in, on, by, for, with…). Fixed from the source's.split('').join('')no-op. - Punctuation randomization — direct port of the source's map: commas, colons, dashes and parens flip to alternatives at random.
- Lowercase-first + ellipsis — opens with a lowercase letter and ends with
...for a casual voice (matches the source).
What the algorithm does not do
- It does not claim "100% undetectable" — detectors update, and source matters. Always re-read the output.
- It does not store or train on your text. Pollinations is queried with
private: trueso the request stays out of the public feed.
Privacy
- File extraction (DOCX, PDF) and every post-pass run locally.
- Only the AI rephrase pass sends data — disable that toggle for fully offline operation; the hidden-char + punctuation passes still run.
- Page assets are cached by the HCODX service worker for instant loads on subsequent visits.