CheckerAISee the overall score
A higher score means more signs of AI writing were found.
Free AI Detector & AI Checker
Check for signs of AI writing from ChatGPT, GPT-5, GPT-6, Claude, and Gemini. See your score and highlighted passages.
Free to useNo sign-up
PDF, Word or text files · Up to 20 MB
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What the AI detector shows you
Read flagged passages alongside your original text.
Find flagged passages
Read each highlight in the original text, with the surrounding sentences still in view.
Check longer texts
Long documents are checked in sections. You'll get one overall result when every section is done.
Check your text in three steps
The AI checker works with pasted text or an uploaded document. No account is needed.
1. Add your text
Paste your writing or upload a document.
2. Run the check
Select Detect AI and wait for the check to finish.
3. View your results
View the score, then read any highlighted passages.
An AI checker for everyday writing
Before submitting an essay
Check your final essay draft before handing it in. If anything is flagged, read that passage and make sure your citations are complete.
When reviewing student work
An AI detector can help you choose passages to discuss with a student. Ask about their examples and sources before deciding what the result means.
Before publishing an article
Use the AI checker when reviewing a draft for publication. Read flagged sections alongside the sources the writer cites.
When reviewing team content
Check reports, articles, or product copy before the next editing round. Send the writer the flagged passages and your questions.
A practical guide to the AI detector
What the score means, how to check an import, and what happens to your text.
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Reading your score and highlights
The AI detector gives an overall estimate and marks passages it flags in your text.
- Read the paragraph around each highlight.
- Check facts and citations separately.
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The AI detector score estimates how closely your text resembles generated writing. For example, 70% does not mean that 70% of the words were confirmed as AI-written. The number alone cannot tell you who wrote the document.
Read each highlight with the paragraph around it. A quotation or definition may make more sense in context. Highlights from the AI detector identify passages to inspect, without giving each sentence a separate probability. You can read them directly in the original text.
Check whether the cited source supports the claim and whether the example supports the conclusion. An AI checker does not verify facts or citations. If something is unclear, ask the writer for an explanation or revise the sentence so readers can follow it.
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Check your document before analysis
Make sure the text in the editor matches the document you want to check.
- Look for missing paragraphs or text in the wrong order.
- Keep quotations and the citations that go with them.
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Choose the text you actually want the AI detector to check. Keep the surrounding paragraphs when they explain a quotation or argument. Leave unrelated material out. Save the original before editing an import so you can tell which version the result belongs to.
Read the imported text before starting the AI checker. Columns, headers, tables, and footnotes can change order during extraction. Check for missing paragraphs and words. If a scanned PDF produces no readable text, paste a text copy or try a document with selectable text.
The AI checker accepts PDF, Word (.docx), TXT, and Markdown files up to 20 MB each. Images and embedded fonts count toward that limit. If an upload fails, try a smaller file or paste the relevant text into the editor.
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Checking a long document
Long documents are checked in sections, with one overall score at the end.
- Keep this tab open while the check runs.
- Retry unfinished parts if a section fails.
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The AI checker splits long documents automatically. Progress shows how many parts have finished; the overall score appears once every part is complete.
Select Retry unfinished parts if a section fails. Completed sections stay available during the session. Wait for any retry countdown and keep the tab open; refreshing can discard progress.
The AI checker weights each section's score by its returned word count. Longer sections influence the total more, so read the highlights even when the overall score is low. After editing, check the revised text again.
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How your text is processed
The AI checker needs an internet connection and uses external processing services.
- Check that you have permission to share the document.
- See Privacy for storage and deletion details.
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Selecting Detect AI sends the editor text to an external service for analysis. TXT and Markdown imports are read locally in your browser, but their text is still sent online when you start a check.
PDF and Word imports use temporary private storage and an external extraction service before reaching the AI checker. We request deletion of the extraction file afterward, without guaranteeing immediate removal of every copy. The services have their own retention policies.
Follow your school or workplace rules, remove unnecessary personal details, and get permission before sharing confidential material. This site doesn't publish results or keep a database history. External services have separate data handling policies.
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When a result doesn't look right
An unexpected AI detector result needs a closer look at the text you checked.
- Confirm you checked the right text and version.
- Use drafts and notes to discuss a flagged passage.
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Did you upload an old draft, miss a paragraph, or repeat page headers? Fix import errors before checking again. If the text is correct, examine the flagged passage.
Ask why the writer chose an example or where a quoted figure came from. An AI checker can't answer those questions. Discuss the passage with the writer, using drafts and notes to understand how it developed.
When an AI checker result raises a concern, follow your institution's review process. Record the passage, your question, and the writer's response before making a decision. For your own drafts, fix unclear sentences and unsupported claims rather than changing words just to lower a score.
Questions about our AI checker
Is this AI checker free?
Yes. Text checks and document imports are free, with no account or subscription needed. If the page asks you to wait, try again later.
How does an AI detector work?
An AI detector looks for writing patterns that resemble generated text, then returns a score and flagged passages. It analyzes the words you submit, without seeing the writing process or recovering the author's prompts.
Can this AI checker detect ChatGPT writing?
You can check text from ChatGPT, Claude, Gemini, and other writing tools. Results can vary between tools and versions, and edited output can be missed. The AI detector does not reliably identify which model was used. A low score does not confirm that no AI tool was involved.
How accurate is an AI detector?
No AI detector gets every text right. We haven't published an independent accuracy benchmark for this service, so we don't promise a particular success rate. An AI checker can flag human writing or miss generated text. A score alone is not enough evidence for a grading, hiring, or publication decision.
What does an AI detector score mean?
The score estimates how closely your text resembles AI writing, without confirming which words were generated. For long documents, the AI checker combines section scores. The guide above explains their weighting and how to read the highlights.
Can an AI checker flag human writing?
Yes. This is called a false positive: human writing is marked as possibly generated. An AI detector compares patterns in text; it does not witness the writing process. If this happens to your work, keep the checked version and any drafts or notes that help explain how you wrote it.
Why do AI detectors give different results?
Different tools use different models and scoring rules. One AI detector may rate a whole document differently from a tool that focuses on individual sentences. Compare the same text version and read each tool's explanation of its score. Averaging numbers from several tools does not give you a verified result.
Is an AI checker also a plagiarism checker?
No. This tool looks for signs of generated writing. A plagiarism checker finds matching text in other sources. For a similarity report, use a separate plagiarism check and inspect the sources it finds.
Is my text stored or shared?
We don't publish submissions or keep a detection history in our database. The AI checker uses external processing services; PDF and Word imports also use temporary storage. See Privacy for data handling and deletion details.
Are AI checker results saved?
Your results stay in this tab; there is no saved history. Refreshing or closing it can lose them. Record any scores and passages you need, together with the exact text you checked.