How do AI detectors work?

They compare your text with the statistical patterns of AI-generated writing: how predictable each word is, how uniform your sentences are, how much the passage varies. From that they estimate a likelihood. They don't read meaning or know who typed it, so the honest output is a likelihood with its uncertainty, never a verdict.

How accurate are AI detectors?

Not fully, and no tool can promise certainty. Human writing gets flagged, and detectors disagree with each other. That's why we never show a bare score, always show the uncertainty and publish our limits. Use the check to find what stood out, not to chase a number.

Do I need an account to check my text?

No. The check above needs no login. Paste your text and see how likely it is to be flagged, with the uncertainty shown. You only create an account to see every finding, the fixes and your full report, or to run the Full Check.

AI Detector

See how likely your text is to be flagged as AI, with the uncertainty always shown.

Check before submitting

See what stood out

Never a naked score

AI Detection supports English only.

Your documents are never indexed, resold, or used to train detection models.

The check

What this check can and can't know

AI detection is probabilistic. Human writing gets flagged, and different detectors disagree with each other. That is exactly why every result here shows the likelihood with its uncertainty and never a verdict.

No bare scores. Every finding explains what was found, why it matters and how to fix it.
We publish our accuracy limits. No tool can promise certainty.

Inside the report AI Detection

AI-writing signalBeta

Signal strength

Minimal593 words

This document contains patterns commonly associated with AI-assisted writing. This is not proof of AI use.

0100

The likelihood, its band, the word count and the limits, shown every time. Never a bare score, never a verdict.

Results

What the bands mean

Every result lands in one of four bands: a likelihood, never a verdict. When the signals disagree, we say so instead of guessing.

Minimal

Little to no AI-pattern signal. Submit with confidence.

Moderate

Some patterns detectors associate with AI. Worth a read-through in your own voice.

Elevated

Strong pattern overlap. Revise the generic phrasing, then re-check before you submit.

Inconclusive

The signals don't agree enough for a stable reading, and we say so.

More checks

Make your document even stronger

Check for plagiarism

Now see which passages match published work, so every source gets its credit.

Check my document

Check your grammar

Revised a passage? Make sure the rewrite reads correctly.

Check my document

Frequently asked questions

Try it free on your own document.

Upload once. Fix what matters.