A percentage you can act on
One AI-probability estimate up top, so you know where you stand before you start editing.
AI Detector
Free AI Detector for Essays
Paste your draft and see an AI-probability estimate with sentence-level signals — not one scary number, but the exact lines that read as machine-written, so you can fix them on your terms.
- No card required
- Sentence-level results
- An estimate, not a verdict
AI detectors flag patterns, not intentions — which means they flag honest, carefully-written essays too. Checking your own work before submission is quality control, the same instinct as running spell-check: see what a reader (or a detector) will see, and revise before it counts against you.
How it works
- 1
Paste your draft
Drop in a paragraph, an introduction, or the whole essay. Longer samples give a steadier, more reliable estimate than a single sentence.
- 2
Read the signals
You get an AI-likelihood percentage plus highlighted sentences — the generic transitions, flat rhythm, and formulaic phrasing driving the score.
- 3
Fix the flagged lines
Rewrite flagged sentences with something only you could write — a specific example, your own data, a real opinion — then re-check and watch the score drop.
Before and after
Before
This essay will talk about the main things that happened and why they mattered to society throughout history.
After
Three forces made the industrial revolution stick — cheap coal, the factory clock, and a new class of people who owned neither.
What you get
Sentence-level highlights
The exact lines pulling the score up, not a black-box verdict on the whole document.
Fix it in the same tab
Flagged a robotic sentence? Switch to the humanizer or improver without leaving your draft.
Honest about limits
It is a writing-pattern estimate to guide revision, never a definitive judgment about who wrote what.
Frequently asked
Is the AI detector free?
Yes. The free plan includes monthly detector checks with sentence-level results and no card required. Paid plans add higher volume for heavy writing seasons.
How accurate is an AI detector?
No detector is definitive. It measures writing patterns — predictability and sentence rhythm — and returns a probability estimate. Human writing that is clean and evenly paced can score high, which is exactly why it is worth checking and revising your own drafts.
Can it check my whole essay?
Yes, and longer samples are more reliable than short ones. Very short snippets are harder to judge, so paste a full paragraph or more for a steadier estimate.
Will it tell me how to lower the score?
It highlights the sentences driving the estimate — generic phrasing, flat rhythm, missing specifics — so you can revise them with your own evidence and voice. The point is stronger writing, not disguising machine-written text.
Related tools
See what a reader will see.
Check your essay freeCheck your essay for AI signals, find the flagged lines, and fix them before submission — free, no card.