AI Text Checker with Sentence-Level Estimates
Review writing patterns locally in your browser. See an overall probability estimate, colour-coded sentences and the signals behind each result.
Paste or upload text to analyse
For a more meaningful pattern estimate, use at least 150 words. Processing stays in this browser and the text is not uploaded by this checker.
Pattern review
Sentence-level review
Select a sentence card to read the signals that affected its estimate.
Before you use the tool
Read the practical limits and privacy information for this feature.
Can this checker prove that AI wrote a passage?
No. It estimates patterns associated with predictable or formulaic writing and cannot prove authorship or misconduct.
Why can human writing receive a high estimate?
Formal, highly edited or repetitive human writing can share the same statistical patterns. Short samples also create more uncertainty.
Is my text uploaded?
No. This checker runs locally in the browser. The selected text-based file is read on your device.