Free AI Content Detector
Paste text and get an instant AI-likelihood estimate with a clear breakdown of the signals behind it. No signup, no upload, and no limits. Everything runs in your browser.
How to Use
Paste your text
Drop the text you want to check into the box, up to 700 words. It is read straight from your browser, never uploaded.
Press Check for AI
The tool scores the text on six writing signals in an instant and shows an overall AI-likelihood estimate.
Read the breakdown
Look past the percentage at the signal breakdown to see why it leaned the way it did, then use your own judgment on the result.
A free AI content detector that gives an instant, transparent estimate
This is a free AI content detector that estimates how likely a piece of text was written by AI, and shows you the signals behind the score. It runs entirely in your browser, so there is no signup, no word-count paywall, and nothing you paste is ever uploaded to a server.
Most detectors give you a single percentage and ask you to trust it. This one is built to be transparent instead. Paste your text, and it breaks the score down into plain signals like sentence rhythm, stock AI phrasing, and punctuation habits, so you can see why it leaned the way it did. Think of it as a fast first-pass check, not a courtroom verdict.
How does this AI content detector work?
It reads your text for the writing patterns that AI models tend to produce, then blends them into one AI-likelihood score. It does not send your text anywhere, and it does not need an account. Here are the six signals it weighs.
| Signal | What it checks |
|---|---|
| AI phrasing and hedges | Stock AI phrases and filler words like “delve”, “crucial”, and “various” |
| Sentence rhythm | How much sentence length varies. Human writing is bursty, AI is even |
| Transition openers | Sentences that start with However, Moreover, Furthermore, and similar |
| Tone | Use of contractions and a casual voice, which humans lean on more |
| Repetition | Repeated two and three word phrases |
| Punctuation | Heavy em-dash use and flat, comma-only punctuation |
How accurate is an AI content detector?
No AI detector is fully accurate, free or paid. Even the best tools miss edited or paraphrased AI, and they sometimes flag genuine human writing as AI, especially formal or academic prose. This tool gives an estimate based on writing patterns, so treat a high score as a reason to look closer, never as proof on its own.
Can this tool be wrong?
Yes, and it is important to expect it. A careful human writer who avoids contractions and writes in even, formal sentences can score high, while lightly edited AI text can score low. That is why the tool shows the signal breakdown instead of just a number, so you can judge the reasoning rather than trust a percentage blindly.
When to use it, and when not to
Use it to sanity-check your own drafts before publishing, to spot writing that reads too generic, or to decide which passages need a human rewrite. Do not use it to accuse a student, a writer, or an employee of cheating. A pattern-based estimate is not evidence, and a wrong call can do real harm to a real person.
Why Use This Tool
Private, nothing uploaded
Your text is analyzed inside your browser and never sent to a server. Nothing is stored, so you can safely check drafts, emails, or client work.
Transparent breakdown
Instead of a mystery percentage, you see the six signals behind the score, so you understand exactly why the text leaned human or AI.
No signup, no limits
No account, no email, and no daily cap. Check as much text as you want, up to 700 words per run, as many times as you like.
Instant result
The estimate appears the moment you press Check. No queue, no loading a large model, no waiting.
Works on any device
Runs in any modern browser on phone, tablet, or desktop. Nothing to install and nothing to configure.
Honest by design
The tool reports an estimate, not proof, and says so. It is built to inform your judgment, not replace it.
Frequently Asked Questions
Is this AI content detector free?
Yes, completely free with no signup, no email, and no limit on how many times you use it. You can check up to 700 words per run as often as you like, at no cost.
Is my text uploaded or kept private?
Your text is never uploaded. The whole check runs inside your browser on your own device, so nothing is sent to or stored on a server. That makes it safe for drafts, emails, and client work.
Does this detector use an AI model?
No. It uses linguistic pattern analysis, looking at signals like sentence rhythm, stock AI phrasing, and punctuation, rather than a trained AI model or an API. That is what keeps it free, instant, and fully private, and it is also why you should read the result as an estimate.
How accurate is it?
It is a pattern-based estimate, not a guarantee. No detector, free or paid, is fully accurate, since AI writing keeps changing and formal human writing can look machine-made. Use the score and its breakdown as a signal, then apply your own judgment.
Can the result be wrong?
Yes. A careful human writer can score high, and lightly edited AI text can score low. That is why the tool shows the six signals behind the score, so you can judge the reasoning instead of trusting a single number.
What AI writing can it catch?
It looks for the general patterns common in text from tools like ChatGPT, Gemini, and Claude, such as even sentence rhythm and stock phrasing. It works best on longer, unedited passages of at least 90 words.
Should I use it to catch a student or employee?
No. A pattern-based estimate is not evidence, and a false positive can seriously harm someone. Use it to sanity-check your own writing or to flag passages for a closer human read, not to accuse anyone.
Is there a word limit?
You can check up to 700 words in a single run, and around 90 words or more gives the most reliable estimate. For a longer document, check it in sections.