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Free AI Detector

Check any text for AI-generated patterns with multi-model analysis

Also available as a Chrome extension — 5 tools in your right-click menu. Install Free →

Humanize Detect Rewrite
Single / Batch
0 words
Result

Detection results appear here

Paste at least 30 words and click Analyze Text to check for AI patterns

Process

How It Works

1

Paste Your Text

Copy and paste the text you want to analyze. Works with essays, articles, emails, reports, or any written content. Minimum 30 words for accurate results.

2

Multi-Model Analysis

Three detection models run simultaneously -- statistical analysis, pattern matching, and ensemble scoring -- to cross-validate results and minimize false positives.

3

Get Detailed Report

Receive an overall AI score, per-sentence color-coded breakdown, and specific patterns detected. If scores are high, send the text to our Humanizer with one click.

Features

What We Analyze

Linguistic Analysis

Measures sentence length variance, vocabulary richness, and structural patterns. AI text tends to be more uniform than human writing.

RoBERTa AI Detector

A transformer-based neural network trained to distinguish AI-generated text from human writing. Runs entirely in your browser — no data uploaded.

Ensemble Score

Combines the AI model and linguistic analysis with weighted scoring. Reduces false positives by requiring agreement across methods.

Use Cases

Use Cases

Teachers Checking Student Work

Quickly screen essays and assignments for AI-generated content. Per-sentence analysis helps identify which sections may need discussion with the student.

Students Self-Checking

Run your own work through the detector before submitting. If you used AI for brainstorming, make sure the final version reads as authentically yours.

Publishers Screening Content

Content editors can verify articles and blog submissions are original human writing before publishing, maintaining editorial standards and audience trust.

Researchers Verifying Originality

Check research papers and grant proposals for AI fingerprints. Ensure your academic writing maintains the rigor and authenticity expected in scholarly work.

Features

Students also use

AI Humanizer Score too high? Try our AI Humanizer → Grammar Checker Fix grammar, spelling, and punctuation with AI → Plagiarism Checker Scan text for potential plagiarism issues → Chrome Extension 5 AI tools in your right-click menu →
FREE
Free

3/day, 300 words, 5 modes

STARTER
$9.99/mo

30K words, 9 modes, batch

PRO
$19.99/mo

100K words, API access, priority

FAQ

Frequently Asked Questions

How accurate is the AI detector?
Our detector combines a RoBERTa transformer model (a neural network trained on AI vs human text) with linguistic analysis. The AI model runs directly in your browser for privacy. While no detector is 100% accurate, our multi-method approach provides reliable results for most content.
Is the detector free?
Yes, completely free and unlimited. The AI model runs in your browser — no server costs, no signup required, no daily limits.
What file formats can I upload?
You can upload .txt, .pdf, and .docx files. Text is extracted locally in your browser — files are never uploaded to any server.
Can I humanize the detected text?
Yes! If your text scores high on AI detection, click "Humanize This Text" to send it directly to our AI Humanizer, which will rewrite it to sound more natural.
Why does the first analysis take longer?
The AI model (~50MB) downloads once on first use, then is cached in your browser. After that, analysis is fast (2-5 seconds). If the model is still loading, you will get instant results from our linguistic analysis engine.
Which AI tools does it detect — ChatGPT, Claude, Gemini?
Yes. The detector is trained to identify patterns common across AI language models including ChatGPT, Claude, Gemini, Copilot, and others. It detects AI writing patterns rather than fingerprinting a specific model, so it works across all major AI tools.
Why might my human-written text score as AI?
AI detectors can produce false positives for text that uses formal structure, repetitive phrasing, or predictable sentence patterns — even when written by a human. Academic writing, business reports, and template-heavy content are more prone to this. The per-sentence view helps identify which specific passages triggered the flag.
Is my text sent to any server when I analyze it?
No. The RoBERTa AI model runs entirely in your browser using WebAssembly. Your text never leaves your device during analysis. This makes our detector one of the most privacy-preserving options available.
Is it really free?
Yes. You get 3 free uses per day with up to 300 words each. The AI Detector is completely free and unlimited. No credit card or signup required.
Do I need to create an account?
No. All tools work without creating an account. Sign up only if you want to track usage history or upgrade to a paid plan.
Can I pay with cryptocurrency?
Yes. We accept USDT, USDC, BTC, ETH, and other cryptocurrencies. No credit card or bank account needed. Plans start at $9.99/month.
Is it safe for academic use?
Our tools help you improve your writing. Always follow your institution's AI usage policy. The humanizer preserves your arguments and facts while making text sound more natural.
Does it work on mobile?
Yes. All web tools work in mobile browsers. For desktop, you can also use our Chrome extension for right-click access.
Is there a Chrome extension?
Yes. Our free Chrome extension includes AI Humanizer, Grammar Checker, AI Detector, Translator, and Word Counter — all accessible via right-click on any website.
How does this compare to GPTZero?
Both detect AI-generated text. Coda One's detector is completely free and unlimited — no daily caps. GPTZero limits free users. Plus, if text scores high, you can immediately humanize it with our AI Humanizer.

Coda One's AI Content Detector analyzes text using multiple detection models -- statistical analysis, pattern matching, and ensemble scoring -- to determine whether content was written by AI or a human. Get per-sentence breakdowns with color-coded scores, and instantly send high-scoring text to our AI Humanizer for rewriting.

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