AI essay checker
Paste your essay and find out three things at once: whether it reads as AI written, what grade it would get, and every spelling, grammar and style problem in the text. No account, nothing saved on a server.
Three checks, one pass
AI detection
Whether the writing reads as generated, and which sentences look flat
Grade
The grade it would get now, and what to fix first
Writing
Spelling, grammar, punctuation, style and clarity, underlined in the text
Nothing is stored on a server and there is no account to make. Your last few essays are kept in this browser so you can come back to them.
What the checker actually tells you
Whether it reads as AI
The detector measures how predictable your writing is. Generated text tends to sit in a narrow band: sentences of similar length, safe word choices, very little variation from one line to the next. Human writing wanders more. You get a percentage, a plain explanation of what that percentage means, and the option to see exactly which sentences pulled the score up.
That last part matters more than the number. Knowing your third paragraph is the flat one is something you can act on.
The grade it would get
Spellcheck tells you a comma is missing. It will not tell you your thesis is buried in paragraph four, or that you never answered the second half of the question. The grader reads the essay the way a teacher does and scores it on argument, evidence, structure and language, then tells you the one change that would move it up the most.
You get the headline here. The full essay grader scores every criterion separately and quotes your own sentences back at you.
Everything wrong in the text
Spelling, grammar, punctuation, style and clarity, underlined where they happen rather than listed in a report you have to cross reference. Click any underline and you get the fix and the reason in one line. Accept it and the text changes.
Style and clarity are the ones students usually skip and teachers usually mark. Wordiness, hedging, repetition, sentences that make the reader go back and read them twice.
How to read an AI detection score
Detectors get talked about as if they were lie detectors. They are not. A score is a measurement of how closely your writing matches the statistical shape of generated text, and plenty of honest writing matches that shape. Here is what the bands mean in practice.
| Score | What it usually means | What to do |
|---|---|---|
| 0 to 20% | Reads as yours. Sentence rhythm and word choice vary. | Nothing. Move on to the grade and the writing issues. |
| 20 to 40% | Mostly human, with a few passages flatter than the rest. Common in introductions and conclusions, where people fall into formula. | Look at the flagged sentences. They are usually the weakest writing anyway. |
| 40 to 70% | Mixed. Either a section was generated, or you write in a very even, formal register throughout. | Rewrite the flagged passages in your own words, out loud if that helps. |
| 70% and up | Matches generated writing closely. Another detector will probably say something similar. | If you wrote it, see the section below. If you did not, rewriting a few words will not fix it. |
Why honest writing gets flagged
This is the single most common reason people come here, so it deserves a real answer rather than a disclaimer at the bottom of the page.
Detectors reward unpredictability. If your next word is hard to guess, you look human. The problem is that a lot of good academic writing is deliberately predictable. You were taught to signpost, to use topic sentences, to keep your vocabulary formal and your structure obvious. Do all of that well and you produce the exact pattern the detector was trained to catch.
It is worse if English is not your first language. Writers working in a second language tend to reach for the safest, most common phrasing, which is also the most probable phrasing, which is what the detector measures. Several studies have found this pattern, and it is the reason no serious school should treat a score as evidence on its own.
If you wrote it and it flagged
- Keep your drafts. Version history in Google Docs or Word is the strongest thing you can show. It records the mess a real draft goes through, which nothing can fake after the fact.
- Vary your sentences. Put a short one after a long one. The single biggest driver of a high score is every sentence being the same length.
- Use your own examples. A specific detail from your own reading, your own class, your own life is something no model would have produced.
- Cut the formula phrases. In today's society, it is important to note, in conclusion. These are the fingerprints of generated text and they add nothing anyway.
- Ask to talk it through. If you are accused, offer to explain your argument out loud. Someone who wrote the essay can do that. It is a fairer test than any detector.
Common questions
Is this AI essay checker free?+
Yes. There is no account, no card and no trial that expires. You paste an essay, you get the three results, and that is the whole thing. There are hourly limits so one person cannot run thousands of checks, but a normal student will never reach them.
Does my teacher see the same score?+
Not necessarily. Every detector was trained on different writing and they disagree with each other all the time. Turnitin, GPTZero and this checker can look at the same paragraph and land in three different places. Use the score to find the flat, generic passages in your writing, not to predict what a specific tool will say.
Why does my own writing get flagged as AI?+
Detectors look for predictability. If you write in even sentence lengths with formal, careful vocabulary, you produce the same pattern a model produces. This hits second language writers hardest, and it hits anyone who has been taught to write in a rigid five paragraph structure. A high score on writing you did yourself is a false positive, not a confession.
Do you keep my essay?+
No. Your text is sent to be analysed and the result comes back, and nothing is written to a database. Your recent essays are saved in your own browser so you can reopen them, and clearing your browser data deletes them for good.
How long does my essay need to be?+
The AI score needs 120 words before it means anything. Below that there is not enough sentence variation to measure and any number would be invented. Grammar and grade work on anything from about 50 words up.
Can I check a whole assignment?+
Up to 4,000 words in one pass, which covers almost every school and undergraduate essay. For anything longer, run it in sections.