AI Detector — Is This Content AI or Not?

AI detector for ChatGPT, Claude, Gemini, and other AI-generated content.

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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 AI-probability score with a confidence level, and for supported languages a sentence-by-sentence breakdown — so you see not just whether your text looks AI-generated, but exactly which lines.

Flagged Passages

Sentences that read as AI are marked in red, so you spot them at a glance (supported languages).

Confidence Scores

An overall AI-probability percentage, plus how confident the model is in it.

Catches Mixed Content

Flags partially-AI writing where only some sentences are AI, not all-or-nothing (supported languages).

Example Results

High AI Probability Detected

Overall score: 87% AI-generated

Analysis completed in seconds
Sentence 192% · Likely AI
Artificial intelligence has fundamentally reshaped how modern industries operate and innovate.
Sentence 254% · Mixed
That said, this rapid pace of change raises real questions we cannot afford to ignore.
Sentence 319% · Likely Human
Honestly? My grandma still calls the internet "the Google" — and somehow she is never wrong.

Built for Every Kind of Writing

Research Papers

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.

AI detector high risk report with a 90 out of 100 score and top signal cards
Reports & Proposals

Polish Before You Send

Screen reports and proposals for AI-generated filler and template phrasing before they reach clients, stakeholders, or your team.

AI detector probability analysis card grid showing human mixed and AI likelihood
Articles & Blog Posts

Keep Your Byline Credible

Check drafts for AI writing patterns so your published articles read naturally and your readers keep trusting your name.

AI detector human success result with a green gauge and zero percent AI probability
School Assignments

Hand In With Confidence

Check essays and assignments for AI writing signals before you turn them in — and see exactly which lines got flagged.

AI detector interface showing submitted text and an 80 percent AI generated result card

How the AI detector reads your text

A lone percentage is easy to doubt. So every result comes with a confidence level, and for supported languages the exact sentences that read as AI, not just a number.

  • Sentence by sentence, not one number

    Most tools hand you a single score. For supported languages, ours also highlights the passages that read as AI-generated, so you can see where the machine writing actually sits.

  • A confidence level with every score

    Each result says how sure the model is. A 60% with low confidence is a maybe, not a verdict, and the page tells you which one you're looking at.

  • 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.

AI Detectionv2
Sample AI probability
92%

Likely AI-generated

Phrasing and rhythm closely match patterns typical of large language models.

AI-generatedHuman-written
Likely AI78%
Uncertain12%
Mostly human7%
Human3%

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 detects text generated by the most popular AI models, including ChatGPT, Claude, Gemini, and Copilot. Get an AI-probability score with a confidence level and, for supported languages, sentence-level highlights — so you know not just whether text is AI-generated, but where.

Our detector is free to use with no sign-up required. Paste your text, get an AI-probability score in seconds and, for supported languages, a sentence-by-sentence breakdown of which lines look AI-generated.

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AI detector result illustration

How to use our AI Detector

Paste your text

Drop in an essay, article, email or report. No account needed, and it reads English, Chinese and most other languages.

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Scan 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.

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Read your results

Get an overall AI-probability score with a confidence level and, for supported languages, the exact sentences that read as machine-written.

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Frequently Asked Questions

Use the Best AI Detector

Sentence-Level Detail

Don't settle for one number: for supported languages, see exactly which sentences read as AI.

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.

Try the AI Detector — Free