Per-sentence heatmap
See which sentences push the score up instead of guessing from a single percentage.
AI content detector that shows its reasoning
Paste text or drop a PDF, DOCX or TXT file and the AI detector scores how machine-written it reads — then shows the evidence: a heatmap of the sentences driving the score, the signals behind it and a concrete plan for the passages that read least like you. No black-box number.
Free account: 50 tokens every month · no card needed
What it does
Features of the AI Content Detector
Ensemble of detectors
Several independent models are combined, with a false-positive guard that tempers borderline calls.
Scan as you type
A free on-device estimate updates while you write; run the full check when the draft is ready.
Batch checking
Score many documents at once — useful for a course, a special issue or a set of chapters (paid plans).
Revision plan
Get specific suggestions for the flagged passages, and hand them to the AI Humanizer if you want help rewording them.
Exportable report
Keep the result with the manuscript's history or share it as a report (paid plans).
How it works
From draft to result in 4 steps
- Add the textPaste at least a paragraph, or drop a PDF, DOCX or TXT file.
- Run the checkThe ensemble scores the document and every sentence in it.
- Read the heatmapLook at the highlighted sentences and the signals behind them.
- Revise where it mattersRewrite in your own voice the parts that read generic, then check again.
Who it's for
Built for the people who write research
ResearchersCheck a draft that used AI assistance before you submit it.
EducatorsLook at the evidence behind a score before raising a concern.
EditorsScreen submissions for undisclosed AI-generated text.
WritersFind the passages that sound generic and make them yours.
Questions
Frequently asked questions
Can an AI detector prove that text was written by AI?
No detector can prove it. Scores are probabilities, and careful human writing can occasionally read machine-like. That is why this detector shows the sentences and signals behind the score — treat it as evidence to look at, not a verdict.
Which AI models does it detect?
It looks at statistical and stylistic properties of the text rather than a fingerprint of one model, so it responds to text from the common chat assistants in general.
How much text do I need?
At least a few sentences; longer passages give steadier results. Very short text is hard for any detector to judge.
Is it free?
Every tool opens on the free plan: a free account gets 50 tokens every month. Longer documents, downloads and some advanced modes need a paid plan — the tool tells you when you reach one.
Does it work on PDFs and Word files?
Yes — drop a PDF, DOCX or TXT file, or several at once in batch mode.
Related
Tools that pair well with it
Plagiarism Checker
Check a research paper or thesis for plagiarism, paraphrased copying and AI authorship against open scholarly sources. Highlighted report, private by default.
Learn more →
AI Humanizer
Rewrite AI-assisted drafts so they read naturally and in your own voice. Keeps citations and key terms, polishes paragraph by paragraph, exports .docx.
Learn more →
Academic Grammar Checker
Proofread academic writing with reasons: a writing score, tone read, homophone fixes and a clarity heatmap. Accept or reject every correction.
Learn more →
Try the AI Content Detector now.
Open it in your browser — nothing to install.