Paste any text below — powered by linguistics, not algorithms.
0 / 2,000 words
How This Works
No AI involved — just statistics.
This tool measures 10 linguistic signals that research has found to differ between human and AI writing. Each sentence is scored independently.
Vocabulary density
Sentence uniformity
Passive voice rate
Transition word overuse
Hedging language patterns
+ 5 more signals
Results are statistical estimates
→
5 additional signals
Hedging language frequency
Vocabulary richness (TTR)
Average sentence length
Formulaic opener detection
Flagged sentence rate
—
AI Likelihood
Analyzing…
—
Annotated Text
Highlighted sentences matched multiple AI writing patterns. Click any to see which signals fired.
Signal Breakdown
← Back to overview
Signals — selected sentence
About this score: Text Chex uses linguistic statistics — not an AI grader — to assess AI likelihood. Scores measure patterns in sentence uniformity, vocabulary selection, passive voice, and structural markers shown to differ between human and AI writing. Use as one data point, not a final verdict.
Frequently Asked Questions
Text Chex uses statistical linguistic analysis based on peer-reviewed research into differences between AI-generated and human-written text. Accuracy depends on text length and type — longer samples (100+ words) yield more reliable results. The tool is designed to be a useful signal, not a definitive verdict. It performs best on formal, essay-style writing and may score creative or fragmented text less reliably.
No. All analysis happens entirely in your browser using JavaScript. Your text never leaves your device and is never transmitted to any server. We have no ability to read, store, or access anything you paste into the detector.
The detector is optimized for formal and semi-formal prose — essays, academic writing, articles, emails, reports, and blog posts. It is less reliable on very short texts (under 50 words), poetry, code, social media captions, or text that deliberately mimics unusual styles. For best results, paste a full paragraph or more.
Yes — heavily edited AI text that has been revised for varied sentence length, reduced use of AI vocabulary, and more natural phrasing may score lower. Our tool catches statistical patterns, not intent. A skilled human rewriter can reduce an AI score significantly. This is why we recommend treating results as one data point rather than a definitive answer.
Grammar checking uses the LanguageTool API to process your text. Your text is sent to LanguageTool's servers for analysis and is subject to their privacy policy. We do not store, log, or retain any text you submit for grammar checking. For sensitive documents, consider reviewing LanguageTool's data handling policies at languagetool.org.
Yes, Text Chex is completely free to use. The AI Detector runs entirely in your browser at no cost. The Grammar Checker uses the free tier of the LanguageTool API. The site is supported by non-intrusive advertising. No account, subscription, or payment is ever required.
Get in Contact
Have a question, feedback, or a business inquiry? We'd love to hear from you. Reach out and we'll get back to you as soon as possible.
Paste your text below to detect grammar, spelling, and punctuation issues.
0 / 1,000 words
Analyzing your text — this takes a moment…
Annotated Text
Spelling
Grammar
Punctuation
Style
Issues Found
Corrected Text
Copied!
Coming Soon
Plagiarism checking is on the way. We're building a tool that searches the open web for verbatim matches — no AI, just real search results.
In Development
Report Incorrect Result
Help us improve Text Chex accuracy
What seems wrong?
Additional comments (optional)
Privacy Policy
Effective date: January 1, 2025
Overview
Text Chex is a browser-based AI text detection and grammar tool. This Privacy Policy explains what information may be collected and how it is used.
AI Detector — Your Text
All AI detection analysis is performed entirely in your browser using client-side JavaScript. Your content is never transmitted to any server, stored, or accessed by us.
Grammar Checker — Your Text
Grammar checking uses the LanguageTool public API. Text you submit for grammar checking is sent to LanguageTool's servers for processing. We do not store or log this text. See LanguageTool's Privacy Policy for details.
Automatically Collected Information
Basic server log data may be collected including browser type, device type, IP address (anonymized), and pages visited. This is used for aggregate analytics only and is not sold to third parties.
Google AdSense & Advertising
This site uses Google AdSense. Google may use cookies to serve ads based on your prior visits. You may opt out at Google Ad Settings. See Google's Privacy Policy for full details.
Cookies
Text Chex does not set first-party cookies. Third-party services (Google AdSense, LanguageTool) may set their own cookies. You may manage these through your browser settings.
Children's Privacy
This site is not directed to children under 13. We do not knowingly collect personal information from children under 13.
Changes
We may update this policy. Changes will be posted here with an updated effective date.
By using Text Chex ("the Site," "the Service"), you agree to these Terms of Use. If you do not agree, do not use the Service.
2. Description of Service
Text Chex provides a free, browser-based AI content detector and grammar checking tool. Results are generated using statistical linguistic analysis and third-party APIs. The Service is provided "as is" without warranties of any kind.
3. User Responsibility
You are solely responsible for the text you submit and any conclusions you draw from the results. You agree not to use this Service to:
Falsely accuse individuals of misconduct based solely on tool results
Submit content that violates any applicable laws
Attempt to reverse-engineer, scrape, or abuse the Service
Use the Service for any unlawful, harmful, or fraudulent purpose
4. Accuracy Disclaimer
Text Chex results are statistical estimates, not definitive determinations. The AI detector and grammar checker may produce false positives or false negatives. Results should be used as informational guides only and should not be relied upon for consequential decisions including academic, legal, or employment matters without independent verification.
5. Privacy Expectations
AI detection is processed entirely in your browser — no text is transmitted. Grammar checking uses the LanguageTool API. See our Privacy Policy for full details. We do not sell your data.
6. Intellectual Property
All original content, design, and software on this Site is owned by Text Chex. You may not reproduce, distribute, or create derivative works without express written permission.
7. Third-Party Services
The Service integrates Google AdSense (advertising) and LanguageTool (grammar API). Use of these features is subject to their respective terms and policies. We are not responsible for third-party service availability or accuracy.
8. Limitation of Liability
To the fullest extent permitted by law, Text Chex and its operators shall not be liable for any indirect, incidental, special, consequential, or punitive damages arising from use or inability to use the Service, including reliance on tool results.
9. Changes to Terms
We reserve the right to modify these Terms at any time. Continued use of the Service after changes constitutes acceptance of the updated Terms.