AI Content Detector

Get an estimate of whether a text was written by a person or by AI, with the limits shown next to the number.

0 words · 0 characters

Text language

Deep analysis (AI second opinion)

The AI-writing estimate and the sentences that read most machine-like appear here.

Your text is never stored. Core features free forever. Deep analysis sends your text to an AI model on Cloudflare Workers AI for this request only. Nothing is stored.

Summary

The AdeptWrite AI Content Detector estimates how much a text reads like AI writing. Paste at least 40 words (up to 6,000 characters) and it shows a band, likely written by a person, mixed or uncertain, or likely AI-generated, with an approximate score and the most machine-like sentences highlighted. The score is a statistical estimate, not proof, and it is weaker on short, edited or non-native writing. Never use it as the only evidence against a person.

How to use AI Content Detector

Paste your text: at least 40 words and at most 6,000 characters. Longer texts of 150 words or more give steadier results.
Check the text language, or leave it on auto-detect.
Click Check. The statistical analysis runs in your browser.
Read the band, the approximate score, the highlighted sentences and the limitations listed with the result. Optionally run the deep analysis.

Before & after

BEFORE

A 200-word student essay in which three sentences are generic, evenly paced summary statements, and the rest contains specific personal detail and uneven sentence lengths.

AFTER

Band: Mixed or uncertain. Score: about 40 %. 3 of 14 sentences read machine-like (highlighted). The result also shows the measured accuracy of the model, its limitations and the line "Never use this result as the sole evidence against a person."

Note: An illustrative result, not a real scan. Mixed documents often land in the middle band, which is a signal to read the text closely, not a finding.

Features & modes

Three bands, not a verdict — Likely written by a person, mixed or uncertain, or likely AI-generated, always shown with an approximate score and never as 0 % or 100 %.
Sentences highlighted — The passages that read most machine-like are marked, with the note that this is weaker evidence than the overall estimate.
Runs in your browser — The model runs on your device, so the basic check sends no text to a server.
Measured metrics shown — The result shows performance on held-out test data, including how often it wrongly flags human writing.
Optional deep analysis — An experimental AI second opinion sends your text to an AI model for that one request.

Made for

Writers checking their own drafts

See whether a passage you edited with AI help still reads machine-like.

Teachers and editors

Treat a high score as a reason to read closely and ask the writer about their process, never as evidence on its own.

Students

Check your own writing if you worry about being flagged, and keep drafts as proof of your process.

Can anyone reliably detect AI writing?

Not with certainty. AI detectors, including this one, estimate patterns such as predictable word choice and unusually even sentences. Those patterns also appear in formal, formulaic or second-language human writing, and editing AI text often removes them, so every detector makes both kinds of errors.

How to read a result

Read the band first, then the limitations listed under it, and only then the highlighted sentences, which carry the least signal. Treat each as a prompt to read more closely.

Likely written by a person: the text did not read machine-like. It does not prove a person wrote it.
Mixed or uncertain: the signal is weak or the document has both styles. The best next step is to read the text yourself.
Likely AI-generated: the text reads like the AI samples the model was tested on. Treat it as a reason to ask questions, not as a conclusion.

If you were flagged by a detector

Stay calm and keep your evidence: drafts, notes, version history in Google Docs or Word, and sources you used. Offer to explain your argument and to write a short passage in front of your instructor. Read our guide on what to do if you are falsely accused of using AI.

If you are an educator or editor

Use a detector as one input at most. Compare the text with the writer's earlier work, ask about their process, and follow your institution's policy before any decision.

If AI-assisted text reads stiffly, the AI Humanizer rewrites it to sound more natural and personal, and you remain responsible for disclosing AI help where your school or employer requires it. To check for copied text instead, use the Plagiarism Checker. The two answer different questions: one looks for matching sources, the other estimates writing style.

Honest limits

What the score is

The detector is a statistical model built on hashed word and character n-grams plus a small set of style measures such as sentence-length variety. It outputs a score between 0 and 1, which is shown as a band and an approximate percentage. It was calibrated on test data with equal numbers of human and AI texts, so it is not the chance that this text was written by AI.

Measured accuracy

The table at the end of this section is generated from the shipped model file. It reports hits, false positives and the languages measured. For a language the detector was not trained on, it shows no estimate.

Limitations

Short texts (under about 150 words) are scored much less reliably, and under 40 words they are not scored at all.
AI text that was paraphrased, edited or "humanised" is usually missed.
Simple, formulaic or non-native writing can be wrongly flagged as AI.
Text rephrased with AI writing tools, including AdeptWrite's own, can be labelled mixed or likely AI.

Never use this result as the sole evidence against a person.

Deep analysis

If you choose the deep analysis, your text is sent to an AI model on Cloudflare Workers AI for this request only, and nothing is stored. The result is labelled experimental.

This is a statistical estimate, not proof. Never use it as the only evidence against anyone.

Frequently asked questions

Is the AI Content Detector free?

Yes. It is free for the basic check, which runs in your browser, with no account needed. The optional deep analysis has a small daily allowance on the free plan. Each check needs at least 40 words and takes up to 6,000 characters.

How accurate is it?

It is a statistical estimate, not proof, and no detector is always right. Each result shows how the detector performed on held-out test data, including its false-positive rate, and where a language was not measured the page says so. Short, edited and non-native text is the weakest.

Can it wrongly flag my own writing?

Yes. Simple, formulaic or second-language writing can be flagged by mistake, and so can text you corrected with AI tools. Keep drafts and version history as evidence of your process, and never accept a score as the only basis for an accusation.

Is my text sent to a server?

The basic statistical check runs in your browser, so your text stays on your device. If you choose the optional deep analysis, your text is sent to an AI model on Cloudflare Workers AI for that one request only, and nothing is stored.

Should teachers use it to grade or punish students?

No. A score alone is weak evidence and has known false positives, especially for non-native writers. Use it, at most, as a prompt to talk to the student, compare earlier work and follow your institution's policy. Never use it as the sole evidence.

AI Humanizer Rewrite AI-drafted text so it reads naturally and personally, without changing the meaning. Plagiarism Checker Find passages that match open encyclopedic and academic sources, with every source searched listed. Paraphrasing Tool Rewrite sentences in 7 modes: Standard, Formal, Casual, Academic, Creative, Shorten, Expand. Grammar Checker Fix grammar, spelling and punctuation in English and other languages, with every change highlighted.

Related guides

How Do AI Detectors Work, and How Accurate Are They? — AI detectors do not read minds or find a watermark. They measure how predictable a text is, or they use a classifier trained on examples of …
Falsely Flagged as AI? Causes and Next Steps — If an AI detector flagged writing you did yourself, stay calm: detector scores are statistical estimates, not proof, and they can be wrong, …
Is Using AI Plagiarism? How to Disclose It — Using AI is not automatically plagiarism, but passing off AI-generated text or ideas as your own work usually is, and so is using AI where y…
How to Make AI Text Sound Human: Ten Edits for Voice — To make AI-drafted text sound human, edit it for voice and accuracy: add specifics only you know, vary sentence length, cut filler, take a c…

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Published by the AdeptWrite Editorial Team

Editorial & AI policy

Last updated: Nov 1, 2026