Protected by Refrazr
95%+ bypass rate · zero text storage

Make AI text
undetectable.

Refrazr rewrites at the structural level — the patterns detectors actually measure. Not synonym swaps. Deep rewriting that reads like a person wrote it.

GPTZero Turnitin Sapling Originality Winston
0 words

How it works

Three steps to
human-sounding text.

01

Paste

Drop your AI-generated text. The tool instantly runs pattern analysis — sentence variance, AI vocabulary, transition density — and shows exactly what a detector would flag.

02

Humanize

One click. The LLM rewrites at the structural level, guided by detected patterns. Then 60+ post-processing rules strip residual AI fingerprints. Takes 5–15 seconds.

03

Verify & copy

See your score drop from 70–95% to under 5%. Review the pattern analysis. Copy with confidence, or re-humanize for an even lower score.

Bypass rates

Not all humanizers
are equal.

ToolBypassMethodPrice
Refrazr95%+Structural rewritingFrom $1.99
Undetectable.ai92%AI rewriting$19/mo
QuillBot45%Paraphrasing$8.33/mo
Grammarly40%Grammar rewrite$30/mo

Based on internal testing with GPTZero, Turnitin, and Sapling. Results vary by text length and complexity.

Use cases

Built for people who
write with AI.

From students submitting essays to marketing teams producing content at scale — anywhere AI text needs to read like human writing.

Students
Turnitin-safe essays from AI-assisted drafts
Writers
Natural-sounding content from AI outlines
Professionals
Polish AI drafts into human communications
SEO teams
Rank-safe content that passes Google signals
Researchers
Test detector accuracy with real samples
Falsely accused
Prove flagged text was written by a human

Under the hood

Why Refrazr
actually works.

01 — REWRITING

Deep structural rewriting

AI detectors measure statistical patterns — balanced parallel clauses, predictable transitions, uniform sentence lengths. Refrazr targets these directly. The LLM receives a pattern analysis and specific instructions to break each detected fingerprint. The result reads like a person with a distinct voice wrote it.

02 — POST-PROCESSING

60+ deterministic rules

After the LLM rewrite, a rule-based post-processor runs 60+ transformations: stripping AI vocabulary (words like "crucial", "delve", "straightforward"), enforcing burstiness (the natural mix of short and long sentences), and breaking symmetrical structures. This deterministic layer pushes the AI score to near zero.

03 — TRANSPARENCY

See your score before copying

Refrazr shows the AI score immediately — before and after. The scoring runs locally in your browser using the same pattern analysis that major detectors use. You see exactly which patterns remain and can re-run if needed.

04 — PRICING

99% margin = honest pricing

Most competitors charge $20–30/month because they use expensive closed models. Refrazr runs on DeepSeek V3 — frontier-quality at a fraction of the cost. Word packs from $1.99, Pro at $6.99/month. The free tier at 500 words/day is genuinely free.

Pricing

Start free. Pay when
you need more.

Free
$0
forever
500 words/day
All writing styles
Score preview
Popular
Pro
$6.99
/month
Unlimited words
Priority processing
All features
Word Packs
$1.99
one-time, from
3K / 10K / 30K words
Never expire
No subscription
Full pricing details →

FAQ

Common questions.

Does AI humanizer actually work?
Yes. Refrazr achieves a 95%+ bypass rate on GPTZero, Turnitin, Sapling, Originality.ai, and Winston AI. The tool uses deep structural rewriting — it changes sentence architecture, rhythm, and vocabulary distribution, not just synonyms. Independent tests show that simple paraphrasers like QuillBot only bypass detection 40–45% of the time.
How does AI humanizer work?
Refrazr runs your text through a multi-stage pipeline. First it classifies the AI patterns present — parallel list structures, formulaic transitions, unnaturally even sentence lengths. Then the LLM rewrites with explicit instructions to break each detected pattern. After the LLM pass, 60+ post-processing rules strip residual AI vocabulary, enforce burstiness, and fix symmetrical constructions.
Is AI humanizer safe to use?
Yes. Refrazr does not store your text. The process is: receive text, rewrite, return result, discard. Nothing is logged, shared with third parties, or used for training. The API runs over HTTPS with end-to-end encryption.
Can Turnitin detect humanized AI text?
Simple synonym-swap tools — yes, Turnitin catches those. Its AI detection looks at per-token probability patterns, not just word choice. Refrazr addresses this by rewriting entire sentence structures. In testing, rewritten text consistently scores below 5% on Turnitin's AI indicator.
What is the best AI humanizer for Turnitin?
Refrazr is specifically optimized for Turnitin, GPTZero, and Sapling. Compared to alternatives: QuillBot reaches about 45% bypass; Grammarly about 40%; Undetectable.ai is close at 92%. Refrazr reaches 95%+ because it targets the structural patterns detectors rely on.
Is AI humanizer free?
Yes, there is a free tier. Free users can humanize up to 500 words per day with no credit card required. Word packs start at $1.99 (one-time, no subscription), and Pro at $6.99/month gives unlimited words.
AI humanizer vs paraphraser — what is the difference?
A paraphraser rewrites text to express the same idea differently. An AI humanizer is specifically engineered to defeat AI detection algorithms. Detection tools measure statistical patterns in how LLM outputs are structured. A paraphraser changes what the text says; a humanizer changes how it was written.
Does it change the meaning of my text?
No. Preserving meaning is the primary constraint. The prompt instructs the model to maintain all factual claims, arguments, and conclusions while only changing structural and stylistic patterns. If a rewrite drifts, use Re-humanize — each pass varies slightly.

Ready to make your
text undetectable?

Paste your text, click Humanize, watch the AI score drop. No account needed. 500 words per day, free forever.

Try Refrazr free →