Undetectable AI
AI text detector and rewriting tool that flags AI-like sentences and rephrases them, with image, audio and document checks.
Undetectable AI is a writing platform with an AI content detector and a rewriting tool. Undetectable AI scans pasted or uploaded text, highlights sentences that look machine-written and rephrases them for a more natural tone. Undetectable AI also checks images, audio, video and PDFs, and runs in a Chrome extension.
Best for Writers, students and marketers who want to see how a detector reads their text and revise passages that sound mechanical.
- Listed in
- AI Content DetectionAI Humanizer
- Platforms
- Web, Browser extension, API
- Pricing model
- Subscription
- Free trial
- Yes
- API
- Yes
- Made by
- Undetectable Inc.
- Added
Last verified: . Information taken from undetectable.ai.
What is Undetectable AI?
Undetectable AI is a writing platform that pairs an AI content detector with a rewriting tool. Pasted or uploaded text is scanned and the sentences likely to be read as machine-written are highlighted; the rewriting tool, which the company calls a humanizer, then reworks those passages by changing sentence structure, vocabulary and tone. Beyond text, the service checks images, voice recordings, videos and PDFs for signs of AI generation or editing, and lists further utilities including a paraphraser, a plagiarism checker, an essay writer and an SEO content writer. A Chrome extension brings the tools to pages such as Google Docs and Gmail. The site says more than fifty languages are supported, with English the most accurate, and offers an API and business plans. Detection results are estimates, and the company's own claims about how rewritten text scores are not repeated here.
Key Features
AI Text Detector
Scans a document and marks the individual sentences it judges likely to be AI-generated.
Rewriting Tool
Rephrases flagged passages by varying structure, word choice and tone to make stiff text read more naturally.
AI Image Detector
Gives a quick assessment of whether a picture was produced by an AI model.
Audio, Video and PDF Checks
Analyses voice recordings and videos for AI generation and inspects PDFs for editing or fabrication.
Chrome Extension
Runs detection, rewriting and paraphrasing on the web page you are working in.
Writing Utilities
Adds a paraphrasing tool, plagiarism checker, essay writer and SEO content writer to the same account.
Use Cases
- Reviewing a Draft
- Check which sentences of an essay or article read as machine-written before editing them.
- Smoothing Stiff Copy
- Rework robotic-sounding marketing or email text into plainer language.
- Verifying an Image
- Test a picture's origin before publishing or sharing it.
- Screening Documents
- Examine a PDF or receipt for signs that it was altered.
- Working in the Browser
- Use the extension to check and rewrite text inside Google Docs or Gmail.
Things to know
- Trial is capped
- The pricing page states that the free trial covers 250 words and further use needs a paid plan.
- Accuracy varies by language
- English is the primary focus; other supported languages are described as less accurate.
- Plans are word-based
- Subscription tiers are defined by a monthly word allowance, and business customers can ask for non-expiring credits.
- Check your institution's rules
- Schools and publishers set their own policies on AI-assisted writing; a detector score or a rewrite does not change those obligations.
FAQs
What is Undetectable AI?
Undetectable AI is a platform that combines an AI content detector, a rewriting tool and related writing and media-checking utilities.
How does Undetectable AI work?
Undetectable AI analyses text to find the parts likely to be flagged as AI-written, then its rewriting tool changes sentence structure, vocabulary and tone in those parts.
Is Undetectable AI free?
Undetectable AI can be started for free, and the pricing page says the free trial is limited to 250 words. Paid plans raise the word limits.
How much does Undetectable AI cost?
Undetectable AI sells monthly and yearly plans sized by words per month, from 10,000 words upward, plus custom business pricing. See the official pricing page for current figures.
Does Undetectable AI support other languages?
Yes. Undetectable AI says its tools support more than 50 languages, with English being the main focus and the most accurate.
Does Undetectable AI have a browser extension?
Yes. Undetectable AI has a Chrome extension that makes its detector and rewriting tools available on web pages, including Google Docs and Gmail.
Who makes Undetectable AI?
Undetectable AI is operated by Undetectable Inc., which lists an address in Sheridan, Wyoming.
Who it's for
- Students
- Educators
- Content writers
- Marketers
- Business owners
Comments
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Alternatives to Undetectable AI
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|---|---|---|---|
 BypassGPTAI humanizer that rewrites AI-generated text to read more naturally, with a built-in AI detector and API. |
Yes | — | Yes |
 RewritifyAI humanizer that rewrites machine-generated text in a more natural style and includes a built-in AI detector. |
Yes | — | — |
 Walter Writes AIAI humanizer and AI detector that rewrites AI drafts into natural prose and scores text for AI likelihood. |
— | $8/mo | Yes |
 WriteHumanAI humanizer that rewrites machine-generated text in a more natural style, with a built-in AI detector. |
Yes | — | Yes |
 IsgenMultilingual AI content detector with sentence- and phrase-level analysis, plus plagiarism and writing tools. |
Yes | — | Yes |
Listed in the same categories as Undetectable AI. A starting price appears only where we checked it on the maker’s pricing page; a dash means not checked or not published. All AI Content Detection tools