Name: Rephrasy AI Detector
Brand: Rephrasy
Rating: 4.9 (203 reviews)

Refine essays, research papers and thesis chapters. Explore academic writing examples and revise your draft with Rephrasy.

A clearer voice for your academic work

Copy your content or start a new paper.

Your paper is ready

AI Writer

SEO Model

Undetectable Pro

Rephrasy v3

Rephrasy v4

Select a model based on your goal. All models produce content that can be humanized afterward.

Choose Your Writing Model

Generate essays, blog posts, and articles with AI — then humanize each paragraph to make your content undetectable by Turnitin, GPTZero, and Copyleaks.

AI Essay Writer

Write, Edit & Humanize

Please enter a topic first

Add specific requirements, key points to cover, or any other instructions...

Topic

e.g. The impact of social media on mental health

Choose your topic, subject area, and length. Our AI drafts a structured essay or article in seconds.

AI-Powered Generation

Every paragraph comes with a one-click humanizer. Make your content undetectable by Turnitin, GPTZero, and Copyleaks.

Built-in Humanizer

Formal, casual, or neutral — and academic subject modes optimized for different fields.

Multiple Writing Styles

Pick from standard, undetectable-focused, or SEO-optimized models depending on your use case.

Choose Your AI Model

Frequently Asked Questions

Generate, edit, and humanize in one place. No copy-pasting between tools.

More Than a Writer — It's a Full Pipeline

From blank page to undetectable in minutes. No switching between tools.

From Blank Page to Undetectable in 3 Steps

Type your topic, choose subject area, page count, style, and language. Takes under 30 seconds.

Enter Your Topic & Settings

Pick the model that matches your goal — standard writing, maximum humanization, or SEO-friendly output.

Select Your AI Model

Edit each paragraph, humanize with one click, then copy or download your finished paper.

Humanize & Download

Draft essays faster and humanize them to avoid AI detection flags on Turnitin and similar tools.

Students

Scale your content output with AI drafts, then polish them into authentic-sounding posts.

Bloggers & Content Creators

Generate optimized articles at scale without triggering Google's AI content filters.

SEO & Marketing Teams

Write fluently in English with AI assistance, then humanize for natural-sounding results.

Non-Native English Writers

Who Uses the Rephrasy AI Writer

Superstealth — our newest model, built for the highest bypass rates

Processing hundreds of Google, OpenAI, or Gemini documents? Use the Rephrasy API to strip SynthID and other AI watermarks programmatically — no UI needed. Plug directly into your content pipeline.

Send thousands of requests in parallel. No rate limits, no monthly caps — pay per credit. Works for Gemini, ChatGPT, OpenAI, and any AI-generated content.

Bulk watermark removal

Bypass SynthID (Google/Gemini), OpenAI watermarks, and statistical signatures from Claude, Copilot, and others — in one API call.

All AI sources supported

Connect via Zapier, Make, or n8n. One POST request strips AI content verification signals from any text, at any volume.

Pipeline-ready

Bypass AI Watermarks at Scale

Since May 2026, every image ChatGPT generates carries two watermarks: C2PA Content Credentials in the file's metadata and Google's invisible SynthID signal in the pixels. A screenshot drops the metadata. SynthID survives it.

A signed "made with OpenAI" manifest in the file. Visible to anyone who checks, and lost on a screenshot or re-save.

C2PA metadata

Spread across the pixel values, so it survives screenshots, cropping, resizing, JPEG compression and filters. Only redrawing the pixels in a diffusion pass removes it.

SynthID in the pixels

Remove SynthID from ChatGPT images

Three ways to remove it

Since October 7, anyone can upload a file at <link>synthid.com</link> and see whether it carries a SynthID watermark. No waitlist, no special access. It recognises media from Google, OpenAI, NVIDIA and Kakao, and Apple Intelligence images are coming soon.

Images, video and audio made with Gemini, Imagen, Veo, ChatGPT and partner tools. Text is not supported.

What it checks

It is not a general AI detector. Media from other generators shows nothing, and it doesn't say whether a file was fully generated or only edited with AI.

What it doesn't tell you

Clients, editors, platforms and teachers no longer need special access. A ChatGPT or Gemini image can now be checked by anyone in seconds.

What changes for you

Google's SynthID Detector is now public

Our new high-quality model removes Google's SynthID watermark with a full diffusion pass while keeping identity, skin and fine detail intact — built for portraits and photos of people, where the standard pass could soften features.

Faces stay faces. SynthID doesn't.

Remove Google's invisible SynthID watermark, C2PA metadata and StableSignature from images made with ChatGPT, Gemini and Imagen. Rephrasy redraws every pixel in a diffusion pass, so the watermark is gone and the image still looks the same. AI text from Gemini, ChatGPT and Claude works too.

SynthID Remover

Remove AI watermarks from ChatGPT & Gemini images

The result reads naturally, passes AI detectors like GPTZero and Turnitin, and carries no SynthID or AI content verification signal.

Clean, verified-free output

Copy content generated by Gemini, ChatGPT, OpenAI GPT-4, Claude, or any AI tool that uses SynthID-style or statistical watermarking into the editor above.

Paste your AI-generated text

Our model regenerates every sentence with different vocabulary and structure. New tokens break the statistical signature that Google's SynthID and OpenAI's watermarking rely on.

Rephrasy rewrites the tokens

SynthID and similar AI watermarks live in the statistical pattern of the original tokens. Rephrasy regenerates entirely new tokens — no original pattern, no watermark.

Bypass SynthID in three steps

Google's SynthID also watermarks images from Imagen and Gemini. OpenAI embeds similar C2PA signals into DALL-E outputs. The Rephrasy Image API removes these invisible watermarks via a diffusion pass — programmatically, at scale.

Remove SynthID from Images — via API

<strong>Text</strong> — embedded in outputs from Gemini and other Google AI models. Removed by Rephrasy's text humanizer above.

What Formats Does SynthID Affect?

SynthID is an identification technology, not a digital rights management (DRM) system. It does not encrypt or restrict access to content. In most jurisdictions, processing AI-generated content that you created or own the rights to — including modifying it to remove embedded identifiers — is legal. Rephrasy is not a tool for circumventing copyright or evading rightful attribution. If you are unsure about the legal status of a specific use case in your jurisdiction, consult a qualified legal professional.

Is Removing a SynthID Watermark Legal?

Unlike visible watermarks or EXIF metadata, SynthID is not a layer you can remove with a crop or a metadata strip. For text, it is baked into the statistical distribution of token probabilities at generation time. For images, Google uses a frequency-domain technique (similar to Discrete Cosine Transform noise injection) that survives JPEG compression, color grading, and resizing. Simple re-saves or format conversions do not remove it. Only regenerating the content — at the token level for text, via a diffusion pass for images — reliably eliminates the watermark.

Why Does SynthID Persist Through Editing?

Removing a SynthID watermark requires rewriting the underlying tokens or pixels that carry the statistical signature — not simply stripping metadata. Rephrasy's humanizer regenerates your text from scratch using a different vocabulary and sentence structure. Because SynthID is embedded in the probability distribution of the <em>original</em> tokens, the new tokens carry no trace of the watermark. The process takes seconds and produces output that reads naturally and passes all major AI detectors.

How to Remove a SynthID Watermark

Google's SynthID for text works by adjusting the logit scores of candidate tokens during autoregressive generation. A secret cryptographic key biases certain tokens to be selected slightly more often across a document. The resulting text is statistically identical to non-watermarked text to a human reader, but over a sufficiently long passage the bias becomes detectable to anyone who holds the key.

Rephrasy removes this by regenerating the content entirely. Our model selects tokens independently — with no knowledge of or reference to the original token sequence. The output shares the same meaning as the input but is drawn from a different region of the probability distribution. The SynthID signal, which depends on the specific token sequence, does not transfer.

SynthID Text Removal — How It Works Technically

C2PA (Coalition for Content Provenance and Authenticity) is an open metadata standard that embeds a signed manifest in the file's EXIF/XMP headers. It is readable, inspectable, and removable by stripping metadata. SynthID operates at a deeper level — it modifies the pixel values or token probabilities themselves. You can remove a C2PA manifest with any metadata editor. Removing SynthID requires a specialized model. Rephrasy's image API strips both: the diffusion pass removes the frequency-domain SynthID signal, and the output has all C2PA headers scrubbed.

OpenAI provides an <link>official image verification tool</link> where you can check whether an image carries a C2PA manifest from OpenAI models. Use it to confirm your image's watermark status before and after processing with Rephrasy.

SynthID vs C2PA: What's the Difference?

Process batches of AI content via the Rephrasy API without per-seat fees or subscription limits.

Developers & agencies

Remove provenance metadata from AI-generated research images before publication to protect workflow privacy.

Journalists

Publish AI-assisted articles that pass AI detectors and carry no identifiable generation fingerprint.

Content marketers

Who Uses a SynthID Remover?

Humanize Gemini or ChatGPT drafts so the final text reflects your voice, not a statistical watermark.

Writers & students

Humanize AI text and detect AI content anywhere on the web — with one click. Convert AI to human text directly in Google Docs, Gmail, LinkedIn and more.

AI Humanizer Chrome Extension

Get unlimited humanizing for 24 hours, or pick a plan to keep going.

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1-day trial

Frequently Asked...

Paste text from ChatGPT, Gemini, DeepSeek or any AI — Rephrasy converts AI to human text that reads naturally. Pass AI detection with ease.

Humanize AI Text Instantly

Check your AI score before publishing. Detect AI content the same way GPTZero, Copyleaks, Turnitin and Originality.ai do — for free.

Built-in Free AI Detector

Rephrasy is the leading AI text humanizer, trusted by 200,000+ students & professionals to make AI-generated content undetectable.

The #1 AI Humanizer for Students

Transform any AI writing into authentic human text. Works with GPT-5, Claude, Gemini 3, DeepSeek-R1 and every other model.

AI to Human Text Converter

Zero grammatical errors. Meaning preserved. Rephrasy delivers the highest quality AI to human text conversion — re-humanize for free if not satisfied.

Premium Humanizer Quality

Stay undetectable across Turnitin, GPTZero, Originality.ai, Copyleaks and ZeroGPT. Rephrasy keeps your content safe from every major AI detector.

Bypass All AI Detectors

The Most Powerful

AI Humanizer in 2026

The Flesch Reading Ease Score measures text readability, with higher scores indicating easier reading and lower scores indicating more complexity.

Rephrase AI to human text in one click. Paraphrase and humanize content from ChatGPT (GPT-5), Claude, Gemini, DeepSeek and Grok into natural, undetectable human writing — and bypass Turnitin, GPTZero, Copyleaks and Originality.ai before you submit your essay.

AI Humanizer

for Students & Professionals

Passes AI detectors?

AI-generated text

Human-sounding text

Paste into Rephrasy

Spot the AI patterns

Rewrite like a human

Keep your meaning

How Can an AI Humanizer

Help You?

Humanize AI text and bypass AI detection in seconds. Rephrasy is the most powerful AI humanizer tool — convert AI-generated content from any model into undetectable, human-like text that passes every major AI detector.

Works with ChatGPT (GPT-5), Claude, Gemini 3, DeepSeek, Grok, Llama, Mistral and any other AI model.

Copy your AI-generated text

Our AI to human text converter analyzes and transforms your content to sound authentically human while preserving meaning.

Paste into the AI Humanizer

One click to humanize. Bypasses Turnitin, GPTZero, Originality.ai, Copyleaks and all other AI detectors.

Get undetectable human text

Convert AI to human text in

three easy steps!

Share your feedback on our models

Image history

10 images — $10

1 image — $1

5 images — $5

{credits} credits — ${price}

No separate plan needed — this tool just uses {n} credits per image. You have {balance}.

Not enough credits

{n} images ready

Works on any plan · {n} credits per image · PNG, JPEG, WEBP

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Drop your image here or click to upload

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Manage your Rephrasy account, view usage statistics, upgrade plans, and access your AI humanizer and detection tool history.

My Account - Rephrasy AI Humanizer Dashboard

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SynthID RemoverRemove AI watermarks from ChatGPT & Gemini images