Turn AI text into writing a human actually wrote.
Paste an essay, article, or a whole document with headings and lists. HumanizerAI rewrites the prose in a real human voice, preserves your structure, and drops the AI-detection score — usually to near zero.
The humanizer
Paste your AI text on the left, hit humanize, and watch the score drop on the right.
Before — AI detection
After — AI detection
Before — readability
After — readability
From robotic to real — the 4-phase pipeline
A four-stage assembly line: grammar profiling → lexical scrub → generative scramble → adversarial validation. The detector grades its own homework before the text leaves the factory.
Phase 1 — Profile
Paste AI text. A spaCy-style profiler maps every sentence: word counts, POS tags, Subject-Verb-Object patterns, passive voice, and burstiness. It builds a grammatical fingerprint.
Phase 2 — Scrub
A WordNet-style dictionary finds AI watermark words (delve, tapestry, leverage…) and swaps each with a POS-aware, lower-level synonym. Multi-word AI phrases get replaced too.
Phase 3 — Scramble
An LLM rewrite with the human-voice prompt: 8th-grade level, high burstiness, no transitions, active voice, colloquialisms, temperature 0.8. Destroys the perplexity score detectors use.
Phase 4 — Validate
A RoBERTa-style detector grades each sentence. Any that still score >50% fake get re-rolled at temperature 0.85. The loop runs up to 3× until the doc crosses 90% real.
Built to actually fool the detectors
Not just a rephrase button. Every feature targets a specific signal that AI detectors rely on.
Phase 1 — Grammar profiling
A spaCy-style profiler maps every sentence: word counts, POS tags, Subject-Verb-Object patterns, passive voice, burstiness. It builds a grammatical fingerprint so the rewriter knows exactly what to break.
Phase 2 — Lexical scrub
A WordNet-style dictionary scans for the AI watermark — delve, tapestry, leverage, intricate, robust, testament — and swaps each one with a POS-aware, contextually accurate, lower-level synonym. No blind swaps that ruin grammar.
Phase 3 — Generative scrambler
An LLM rewrite pass with a specific system prompt: 8th-grade reading level, high burstiness, no transitions, active voice, slight colloquialisms, temperature 0.8. The exact recipe that destroys perplexity scores.
Phase 4 — Adversarial loop
A RoBERTa-style detector grades its own homework. Any sentence that still scores >50% fake gets re-rolled with temperature 0.85. The loop runs up to 3 times until the document crosses 90% real.
Per-sentence detection
Every sentence gets its own fake/real score with the top contributing signal (AI vocabulary, predictable bigrams, sentence length, passive voice, tricolons). See exactly which sentences needed re-rolling.
Structure-aware rewriting
Paste a whole document with headings, paragraphs, lists, and quotes. We detect each block, rewrite only the prose, and reassemble it with the exact same structure.
Multi-detector bypass
Tuned to slip past Turnitin, GPTZero, Originality.ai, Copyleaks, ZeroGPT, and Winston AI. The adversarial loop specifically targets the signals these tools weigh.
Re-roll individual blocks
Don't like how one paragraph turned out? In the block-diff view, re-roll just that block without re-running the whole pipeline.
Readability metrics
Flesch Reading Ease, grade level, sentence/paragraph counts, and reading time for both input and output — so you know the text reads better, not just scores lower.
Upload & download
Drop in a .txt or .md file. Export the result as Markdown or plain text. Up to 50,000 characters per pass.
Private by design
All humanization runs server-side. Nothing is sent to third parties. Your saved history lives in your own database, not in a marketing profile.
Questions, answered
Ready to make your writing invisible to AI detectors?
Paste your text and watch the AI score drop. No sign-up, no credits, no waiting.
Start humanizing