Free AI Content Detector
Paste text to get an instant estimate of how "AI-written" it reads — based on sentence-length variety, word repetition and common AI phrasing. A useful guide, not a verdict (no detector is 100% accurate).
How this AI detector works
Rather than claiming a magic verdict, this tool looks at the signals that tend to differ between human and AI writing and combines them into an estimate: how often common AI-favored phrases appear, how much your sentence lengths vary ("burstiness" — humans vary more), your vocabulary richness, and average sentence length.
It runs entirely in your browser and gives you the underlying signals, not just a number — so you can see why a piece reads as more or less AI-like.
An honest word on AI detection
No AI detector is reliable — and that includes the paid ones. They produce false positives (flagging genuine human writing, especially from non-native speakers) and false negatives (missing AI text that has been lightly edited). Treat any detector’s output as a hint to review, never as evidence.
The better goal is not "undetectable" content — it is genuinely good content: accurate, original, helpful, and shaped by real expertise. That is what readers and search engines reward, however it was drafted.