AI Content Detector
Check articles, blog posts, essays, or marketing copy for AI-generated writing. Paste your content below to get an overall AI score and a breakdown of which passages look machine-written.
Use it to review drafts before publishing, audit submitted content, or sanity-check your own writing. Results are probabilistic signals (and detectors can flag human writing as AI), so combine them with your own judgment.
Sentence-level highlights
See the exact lines that read as AI.
Every major model
ChatGPT, Claude, Gemini — not just one.
Instant & free
No sign-up. Same text, same score.
Honest by design
A probability, never a false verdict.
Frequently asked questions
What counts as AI content?+
Any text produced by a generative model — full drafts, paragraphs, or AI-assisted rewrites. The detector estimates how much of your content shows AI writing patterns.
Can I check long articles?+
Yes. You can paste long content; very long inputs may take a little longer to analyze. For the most reliable score, submit at least 100 characters.
Will editing AI content lower the score?+
Often, yes. Substantive human edits that vary sentence length and structure tend to reduce AI signals — but heavy editing is no guarantee, and detectors remain imperfect.
⚠️ Disclaimer: AI Killer results are probabilistic signals and are not 100% accurate. Detectors can flag human writing as AI, so do not use this as the sole basis for accusations of plagiarism, cheating, or academic misconduct.