AI Detector — Is This Content AI or Not?
Free AI detector for ChatGPT, Claude, Gemini, and other AI-generated content.
Free AI Detector — Real or AI, in Seconds
Paste any text and find out in seconds whether it was written by a person or generated by ChatGPT, Claude, Gemini, or another AI. The free AI detector returns an overall risk score plus a sentence-by-sentence breakdown — so you see not just whether your text looks AI-generated, but exactly which lines.
Color-Coded Heatmap
Every sentence is shaded red, amber, or green, so you spot AI passages at a glance.
Confidence Scores
An overall AI-probability percentage, with a clear read on each sentence.
Catches Mixed Content
Flags partially-AI writing where only some sentences are AI — not all-or-nothing.
High AI Probability Detected
Overall score: 87% AI-generated
Built for Every Kind of Writing
Check Before You Submit
Run a paper through the detector before submission to catch AI-sounding passages and confirm the writing reads as genuinely your own.
Polish Before You Send
Screen reports and proposals for AI-generated filler and template phrasing before they reach clients, stakeholders, or your team.
Keep Your Byline Credible
Check drafts for AI writing patterns so your published articles read naturally and your readers keep trusting your name.
Hand In With Confidence
Check essays and assignments for AI writing signals before you turn them in — and see exactly which lines got flagged.
How we achieve our 99.98% accuracy in detecting AI
A lone percentage is easy to doubt. We built our detector to show its work — so you can see where the AI writing is, and why we flagged it.
Sentence by sentence, not one number
Most tools hand you a single score. Ours highlights the exact lines that read as AI-generated, so you can see where the machine writing actually sits.
Signals you can check yourself
Every verdict comes with the tells behind it — flat rhythm, give-away transitions, unusually even pacing — so the result is explainable, not a black box.
Many models, many languages
Tuned against output from ChatGPT, Claude, Gemini and more, across English, Chinese and beyond — so it keeps pace as new writers appear.
Built to protect real writers
We lean toward fewer false alarms on genuine human work, and treat every score as a strong signal to weigh with context — never a final ruling.
Likely AI-generated
Phrasing and rhythm closely match patterns typical of large language models.
Highlights scan smaller passages, so read them as a guide alongside the overall score.
AI Detector for ChatGPT,
Claude, Gemini, and more
AI or Not accurately detects text generated by the most popular AI models, including ChatGPT, Claude, Gemini, and Copilot. Get a precise risk score with paragraph-level annotations and explainable signals — so you know not just whether text is AI-generated, but why.
Our detector is free to use with no sign-up required. Paste your text, get a risk score in seconds, and see a sentence-by-sentence breakdown of exactly which lines look AI-generated.
Try for free
How to use our AI Detector
Paste or upload your text
Drop in an essay, article, email or report — or upload a file. No account needed, and it reads English, Chinese and most other languages.
Try it freeScan it for AI
Hit detect and the AI Detector weighs your writing against the signals large language models leave behind — in just a few seconds.
Try it freeRead your results
Get an overall AI-probability score, the exact sentences that read as machine-written, and the signals behind each call — yours to verify or share.
Try it freeFrequently Asked Questions
Use the Best AI Detector
Sentence-Level Accuracy
Don't settle for one number — see exactly which sentences read as AI, scored and color-coded line by line.
A Generous Free Limit
Paste up to 500,000 characters per check, free — far more than most detectors give you.
More With a Free Account
Create a free account to unlock higher daily limits and keep a history of every check you run.