Instantly detect AI-written content with our free AI content detector. Paste any text to check if it was written by ChatGPT, Claude, Gemini, or other AI writing tools. Get detailed analysis with the same accuracy as GPTZero and Turnitin - completely free with unlimited scans.
Measures how predictable your text is - the core method used by GPTZero. AI-generated text from ChatGPT and Claude has low perplexity (high predictability), while human writing is more varied and surprising.
Analyzes sentence length variation. Human writers naturally create 'bursts' - mixing short punchy sentences with longer complex ones. AI writing tools produce unnaturally uniform sentence patterns.
AI tools like ChatGPT produce text locked in a narrow readability range (Grade 8-10). Our AI detector flags content with suspiciously consistent readability scores that indicate machine generation.
Identifies tell-tale ChatGPT patterns: overused transitions ('Furthermore', 'Moreover', 'Additionally'), generic openers, and repetitive n-gram sequences that reveal AI authorship.
See why 10,000+ users prefer our AI content detector over expensive alternatives like GPTZero and Originality.ai.
| Feature | HumanizerAI | GPTZero | Originality.ai |
|---|---|---|---|
| 100% free detection (no limits) | |||
| 6 detailed metrics breakdown | |||
| Sentence-level AI highlighting | |||
| Built-in AI humanizer tool | |||
| Developer API access | |||
| No watermarks or usage caps |
Check your essays and papers before submitting to Turnitin. Ensure your AI-assisted research and writing won't get flagged or penalized.
Verify your articles pass AI detection before publishing. Google's helpful content update may demote detectable AI content in search rankings.
Screen student submissions for AI-generated content. Quickly identify ChatGPT, Claude, and other AI tool usage in academic work.
An AI detector (also called AI content detector or AI writing detector) analyzes text to determine if it was written by AI tools like ChatGPT, Claude, or Gemini. It works by measuring statistical patterns including perplexity (predictability), burstiness (sentence variation), and identifying AI-specific writing fingerprints that human writers don't produce.
Our AI detector uses the same detection methods as GPTZero and Turnitin - analyzing perplexity, burstiness, readability, and pattern recognition. It accurately identifies AI-generated content from ChatGPT, Claude, Gemini, and other AI writing tools with results comparable to paid alternatives.
Yes, our AI content detector is completely free with no limits. You can check unlimited text without signing up or paying. We offer this free tool so you can see AI detection in action before using our premium humanization features.
Absolutely. Our AI detector works with all major AI writing tools including ChatGPT (GPT-4, GPT-4o), Claude (Claude 3, Claude 3.5), Google Gemini, Jasper, Copy.ai, and any other AI text generator. Simply paste your text to check if it's AI-generated.
If our AI detector flags your text as AI-generated, you can use our AI humanizer to rewrite it. The humanizer transforms AI content into natural, human-like writing that passes GPTZero, Turnitin, and other detection tools while preserving your original meaning.
Unlike GPTZero which limits free users and charges for full access, our AI detector is 100% free and unlimited. Plus, we include a built-in AI humanizer so you can fix any detected AI content instantly - something GPTZero doesn't offer.