Why was my writing flagged as AI when I wrote it myself?

Because detection is probabilistic, not proof. Detectors look for patterns — even sentence rhythm, predictable phrasing, low variation — and human writing has those patterns too, especially clear, polished, or formal prose. A flag means your text resembles the patterns a detector associates with AI, not that a machine wrote it. That's exactly why we never show a naked score: every result pairs the likelihood with the uncertainty so you can see what stood out, revise it in your own voice, and re-check.

How do AI detectors work?

They compare your text against the statistical patterns typical of AI-generated writing — how predictable each word is, how uniform your sentence lengths are, how much variation there is across the passage. From that they estimate a likelihood. They don't read meaning or know who typed it, which is why the honest output is a likelihood with its uncertainty, never a verdict. We show you which passages stood out and why, so the estimate is something you can actually act on.

How accurate are AI detectors?

They're unreliable — that's why we never show a naked score, always show uncertainty, and publish our limits. No tool can promise certainty, and the ones that do are selling it. Human writing gets flagged, and different detectors disagree with each other. We'd rather be honest than scary: use the check to find what stood out and strengthen it, not to chase a number.

Why do different AI detectors give different results?

Because each is trained on different data and weighs the patterns differently, so they disagree — sometimes sharply — on the same passage. No detector can promise what another one will say. A check here tells you what our model noticed and how strongly, with the uncertainty shown; it can't predict another tool's verdict. What travels between tools is your own clear writing and the documented record that you checked it.

How can I prove I wrote something myself?

With evidence, not a score. Run your own check before you submit, see what stood out, revise anything unclear in your own voice, re-check, and keep your verification report as a dated record that you did the work and checked it. If a dispute happens, that record — not a promise from any single detector — is what changes the conversation.

Do I need an account to check my text?

No. The in-page check above needs no login — paste your text and see how likely it is to be flagged, with the uncertainty shown. You'll create an account only when you want to see every finding, the fixes, and your full verification report, or to run the Full Check on the whole document.

AI Detector

See how likely your text is to be flagged as AI.

Words 0

Free accounts include 1,500 scan words — no card required.

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

One upload, every check.

AI detection is one of the checks your reviewer will run. The Full Check runs it alongside plagiarism, grammar, and readability on the same document, and ends in a verification report you can hand over — proof you can stand behind if a dispute happens.

What this check can and cannot know — honestly.

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 naked 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, and the ones that do are selling it.

Sample finding Likely AI-influenced

In today's fast-paced world, it is important to note that leveraging technology can significantly enhance productivity across a wide range of domains. The rhythm and phrasing here match patterns detectors associate with AI.

LikelihoodLikely · uncertainty shown

Even sentence rhythm and predictable, generic phrasing

Detectors are probabilistic, and human writing gets flagged too — this isn't proof. It's a passage worth strengthening: rewrite it in your own voice with specifics only you would write, then re-check to see how it reads.

Flagged as AI, but you wrote it yourself?

A flag isn't a verdict — it means your text resembles the patterns a detector looks for, and clear, polished human writing sets those off all the time. You don't need to disguise anything. You need evidence. Run your own check first, see what stood out, strengthen it in your own voice, re-check, and keep your verification report as your record.

Step 1

Find

See each flagged passage and what stood out, explained — with the uncertainty shown.

Step 2

Revise

Strengthen it in your own voice — your call, in the document.

Step 3

Re-check

Confirm it reads clearly before you submit.

Checked how it reads. Here's the next worry.

Check for plagiarism

The other submit-moment fear — checked how it reads; now see if any passage matches an existing source.

Check my document

Compare two texts

Revised a flagged passage? Compare your before and after side by side to see exactly what changed.

Compare texts

Before you paste your document

"AI detectors are unreliable."

They are — that's why we never show a naked score, always show uncertainty, and publish our limits. We'd rather be honest than scary.

"Your detector isn't the one my client or school uses."

True — no one can promise another tool's verdict. But a documented pre-check catches the passages you can strengthen and changes the conversation if a dispute happens. That's what the report is for.

"Is my unpublished work safe?"

Never indexed, never resold, never used for training. Retention controls on every plan — paste a thesis chapter or a client deliverable with the same confidence either way.

Frequently asked questions

This was one check. This document deserves all of them.

Check how likely your text is to be flagged, see what stood out, then run every check your reviewer will on the same document.