AI ESSAY CHECKER · FREE PLAN
AI Essay Checker: Does This Essay Look AI-Written?
Paste an essay, or upload it as a PDF or Word file with the document detector. Each passage is scored, so a partly generated essay shows up as mixed, with the passages highlighted.
Open in beta · 10 free credits a month · Files deleted after 30 days
AI Text Detector
Open in betaWhat you need
Paste a text of at least 300 characters
At least 300 characters; longer texts give more reliable results.
At a glance
Per passage
Each block of 2–3 sentences gets its own score, so partly generated texts are visible.
AnyFact method
3 levels
Probably human, uncertain or probably AI — never a bare percentage — with the reasons and the limits of the method.
AnyFact method
10 credits
Free every month with an account, no credit card. Uploaded files are deleted after 30 days.
AnyFact free plan
What an AI essay check can and cannot tell you
Essays are often mixed: a student’s draft polished by an assistant, or a generated outline rewritten by hand. A single score for the whole essay hides that; a passage-by-passage view shows it.
For students, checking your own essay before you submit it shows which passages a detector may question, so you can keep your drafts and notes ready to explain your process.
For teachers, the result is a reason to talk with the student, never a sanction on its own. Short essays, heavy editing and non-native writing make every detector less reliable.
Does this sound familiar?
- An essay is far more polished than the student’s usual work.
- You used an assistant for ideas and want to see how your essay reads to a detector.
- A research paper or thesis needs a check before it goes further.
Here's what we check
Paste the text
At least 300 characters; longer texts give more reliable results.
Passage-by-passage scoring
Each block of 2–3 sentences gets its own score, so mixed texts are visible.
A verdict in three levels
Probably human, uncertain or probably AI — never a bare percentage — with a short explanation and the limits of the method.
How to read the result
The signals point to a person. It is not a guarantee: a careful generator or heavy editing can leave few traces.
The signals disagree or are too weak. We say so rather than guess, and list what was found.
The signals point to generation. It is an indication, not proof — check the context before acting.
Sample layout. Real reports name the signals that were checked and the limits of the method.
How to check your essay for AI before you submit it
Run your essay through the AI essay checker, then look at each highlighted passage and ask whether it reflects your own work. The goal is to understand your text, not to game a score.
- 01Paste the body of your essay (at least 300 characters), or upload the whole file as a PDF or DOCX.
- 02Read the verdict and open any passage scored as probably AI.
- 03For each one, ask yourself honestly: did I write this, or did an assistant?
- 04If you wrote it yourself, keep your drafts, notes and version history. They show how the work was produced.
- 05If a passage was generated and your school does not allow that, rewrite it in your own words from your own understanding, or disclose the AI use as your school’s rules require.
How should teachers use an AI essay detector?
Use it to decide which essays deserve a closer look, then rely on what you know about the student. A score starts the process; it does not end it.
- 01Make sure your policy says which uses of AI are allowed for this assignment.
- 02Run the essay and read the highlighted passages, not just the overall level.
- 03Compare the flagged passages with the student’s previous work and in-class writing.
- 04Meet the student. Ask them to explain an argument, a source or a word choice from a highlighted passage.
- 05Record what you found and what was said, and decide with all of it in hand.
Our page for teachers and schools covers policies, conversations with students and how to document a case fairly.
AI essay checker or AI paper checker: paste the text or upload the file?
Paste the text for a quick check of an essay; upload the file when you want the whole paper, including its images and metadata, checked page by page.
| Text detector | Document detector | |
|---|---|---|
| Best for | An essay or an extract | A full paper, thesis or report |
| Input | At least 300 characters of English, French or Arabic | PDF, DOCX or PPTX up to 20 MB and 50 pages |
| What is checked | The text, passage by passage | Text block by block, up to 30 embedded images, metadata, and scanned pages with OCR (first 20) |
| Result | Verdict with highlighted passages | Verdict summarised page by page |
| Credits | 1 | 3 |
The AI document detector page explains the file analysis in detail.
Why can an essay be flagged when you wrote it yourself?
Because academic writing is predictable by design, and predictability is what the method measures. Several ordinary features of student essays push the score toward AI:
- A formal register and set phrases, such as standard transitions and conclusions.
- The classic structure taught in school: introduction, balanced arguments, summary.
- Writing in a second language, which often relies on safer, more common wording.
- Heavy use of grammar or rewriting tools.
- Short essays and long quotations, which leave little of your own prose to score.
If you are worried, talk to your teacher early. Showing your drafts before anyone raises a question is easier than reconstructing your process afterwards.
If your own essay is flagged, your drafts and notes are your best evidence. Our guide on how to tell if text is AI-generated explains why these cases are hard for any detector.
Before you check
Is the result proof that a content was made by AI?▼
No. It is an indication, not proof. Detectors can be wrong in both directions, especially on compressed, cropped, edited or very short content. Use the result to decide what to check next, not as a final judgement on anyone.
Why no percentage?▼
A single percentage suggests a precision no detector has. You get one of three levels — probably human, uncertain or probably AI — with the signals behind it and the limits of the method.
How does the analysis work?▼
When the content carries provenance data, such as C2PA content credentials or metadata, we read it first. Then an open-source detector scores the content. When the score is borderline, Claude reviews it as a second opinion, and the result is explained in plain words.
What happens to my files?▼
They are processed to run your analysis — including, for borderline cases, a review by Claude, Anthropic’s model — and deleted after 30 days.
What does it cost?▼
There is a free plan: a free account gets 10 credits every month, with no credit card. Pro ($15 a month) gives 1,000 credits a month; Business ($49 a month) gives unlimited Business Checks and AI checks under a fair-use limit.
Can I use this result to sanction a student or a candidate?▼
No. Text detectors can be wrong, especially on short texts, heavily edited texts and texts by non-native writers. Use the result to start a conversation, never as the only evidence.
Which languages are supported?▼
English, French and Arabic.
Is an AI essay checker the same as a plagiarism checker?▼
No. A plagiarism checker compares a text with existing sources to find copied passages. An AI essay checker estimates whether the wording looks generated. A text can be original yet generated, or copied yet human-written, so the two answer different questions.
Can I check a full thesis or dissertation?▼
The document detector accepts files up to 20 MB and 50 pages. For a longer thesis, check it chapter by chapter, each as its own analysis.
Do quotations and references affect the result?▼
They can. Long quotations and reference lists are not your own prose, and set formats like citations are predictable. When you paste text, leaving out the reference list keeps the analysis focused on your writing.
Does using a spelling or grammar tool count as AI?▼
The detector cannot tell which tool you used. Light fixes change few words; heavier rewriting changes more of the wording and can score toward AI. Whether it counts as AI use is decided by your school’s policy, so check it.
Check an essay, passage by passage
What you need
Paste a text of at least 300 characters
Free plan — 10 credits every month, no credit card.
Each result is an indication, not proof.
Files deleted after 30 days.
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