How the AI content detector works
- Paste your text — the longer the sample, the more meaningful the read (100+ words).
- The tool scores signals associated with AI writing: very uniform sentence lengths (low "burstiness"), low word variety, and heavy use of common AI filler phrases.
- You get an estimated likelihood and a plain-English breakdown of which signals showed up.
Why AI detection can't be trusted as proof
AI text is generated to look like natural human writing, so there is no watermark to find. Detectors guess from statistical patterns, and those patterns overlap heavily with ordinary human writing — especially clear, well-structured prose, writing by non-native speakers, and short samples. That's why every detector, including paid ones, produces false positives, and why OpenAI retired its own detector for low accuracy. Use this tool to review and improve writing, never to judge or accuse a person.
Benefits
- Analyses text for common AI-writing signals — uniform sentence length, low word variety and filler phrases.
- Gives an estimated likelihood plus a plain-English breakdown of what it found.
- Honest by design: clearly labelled as a guide, not proof.
- Runs in your browser — your text is never uploaded.
Limitations to know
- No AI detector is reliable — this one included. Human writing can score high and AI text can score low.
- Short samples cannot be assessed meaningfully; aim for 100+ words.
- It must never be used to accuse a student or writer of using AI.
Common mistakes to avoid
- Treating the score as proof rather than a rough indicator.
- Judging a short paragraph — the signals need a longer sample.
- Assuming a high score means cheating; clear human writing often triggers it.
Alternatives
To make writing clearer use the Readability Checker; to rephrase text in your own voice use the AI Rewriter.
Last updated: August 2026 · Reviewed by the AI Toolbox editorial team.
Frequently asked questions
Is my text uploaded?
No — the analysis runs entirely in your browser. Nothing is sent to a server.
Can this prove something was written by ChatGPT?
No. Nothing can prove that from the text alone. This is an indicator, not evidence.
Why did my own writing score high?
Clear, evenly structured writing can look "AI-like" to any detector. That's a core limitation, not a verdict on you.
How can I make writing sound more human?
Vary sentence length, use specific personal detail and examples, and cut generic filler phrases.