UndetectedGPT - Free AI Humanizer & Undetectable AI Rewriter | UndetectedGPT

About UndetectedGPT

UndetectedGPT is an AI humanizer that rewrites AI-generated text so it reads as human writing and passes AI detectors. Built and run from Montréal, it serves writers, marketing teams, students, and developers in more than 100 languages, providing tools to craft authentic, undetectable content while preserving meaning and tone.

UndetectedGPT offers an AI detector to preview how major detectors score text before submission, enabling paste-and-upload checks on PDFs, Word, or text files and providing a consolidated view across detectors.

Ghost Writer provides a writing workspace where drafts, edits, and humanizations happen in one place, with options for citations, rewrites, and adding new sections, all within a document editor.

The API and MCP server expose the humanizer as a REST API and a remote MCP server, with the first API key including 1,000 free words, enabling integration into other tools and workflows.

Use cases

Writers and bloggers paste AI drafts to rewrite in a natural, human voice.
Students verify content reads like human writing while bypassing detectors.

Key features

AI Humanizer converts AI-generated text into human-like writing
AI Detector preview for detectors like GPTZero and Turnitin
Ghost Writer workspace for drafting and editing
API access to humanize text programmatically
MCP server support for integrations

Pros and cons

Pros

Supports detection across multiple AI detectors and provides per-detector insights.

Offers free tools like a citation generator, reference generator, rewriter, and paraphraser.

Pricing

Plus

$19.99

per month

1,000 free words with first API key
Access to humanizer features
API and MCP server access

Max

$79.99

per month

Maximum usage limits
Priority support
All features included

Reviews

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Frequently asked questions

What is UndetectedGPT?

UndetectedGPT is an AI humanizer. You paste text written or drafted with AI, and it rewrites the wording so the result reads like human writing and passes AI detectors, while keeping your original meaning.

Does UndetectedGPT work with ChatGPT, Claude, and other AI writing tools?

Yes. It is compatible with all major AI writing tools including ChatGPT, Claude, Google Gemini, Llama, and other language models.

Is there an API?

Yes. The humanizer is available as a REST API and as a remote MCP server for AI agents.

What detectors does it bypass?

Outputs are tuned and tested against the major detectors, including GPTZero, Originality.ai, Turnitin, ZeroGPT, QuillBot, and Grammarly.

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