🔥 Free AI Detection — ChatGPT, GPT-5, Gemini. No sign-up, no limits. Try now →
🔍 AI Detector
🤖 Free · Instant · No Sign-Up

Trusted AI Content Detector
for ChatGPT, GPT-5 & Gemini

Instantly detect whether text was written by AI or a human. Sentence-level analysis, AI probability score 0–100%, downloadable PDF report — completely free.

Sentence-by-sentence highlights
0–100% AI probability score
Supports all languages
PDF report download
🔍 Check for AI-Generated Content
Paste text or upload a Word document — up to 40,000 characters
0 / 40,000 chars
0 characters 40,000 character limit
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Drop your Word file here
Supports .docx and .doc — text extracted automatically
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⏳ Extracting text…
0%
AI Score
AI Content Probability

AI Content Distribution—
Human WrittenMixedAI Generated
📄 Sentence-Level Analysis
High AI
Moderate AI
Human
💡 How to Make Your Text More Human

Simple and Accurate AI Detection

ZeroGPTFree analyses your text across multiple dimensions simultaneously

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Highlighted Sentences

Every sentence colour-coded — red for high AI likelihood, orange for moderate, green for human. See exactly which parts to rewrite.

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High Accuracy Model

Analyses perplexity, burstiness, vocabulary patterns, and structural uniformity — the same signals used by academic AI detection tools.

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Downloadable PDF Report

Professional PDF report for every detection — score, verdict, sentence analysis, and improvement suggestions all included.

What Makes ZeroGPTFree Different

Built for students, educators, and content professionals — reliable detection, no paywall.

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Multi-Model Detection

Identifies ChatGPT, GPT-4, GPT-5, Gemini, Claude, Copilot, Grok, DeepSeek, LLaMA and more.

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100% Free — No Limits

No account, no daily limit, no premium tier. Check as many texts as you need, free forever.

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Instant Results

Score, highlights, and suggestions in seconds — no queue, no wait.

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All Languages

English, Arabic, French, Spanish, German, Chinese and all major languages supported.

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Word File Upload

Upload .docx and .doc files directly — text extracted automatically.

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Detailed Metrics

AI score, predictability, uniformity, and human sentence percentage all shown.

Your Questions, Answered
How does ZeroGPTFree detect AI content?+
ZeroGPTFree analyses perplexity (word predictability), burstiness (sentence length variation), overused AI vocabulary patterns, structural uniformity, and sentence opening variety. AI text scores high on predictability and uniformity — human writing is more varied.
Which AI models can it detect?+
ChatGPT (GPT-3.5, GPT-4, GPT-5), Google Gemini, Anthropic Claude, Microsoft Copilot, Grok, DeepSeek, LLaMA, Perplexity AI, and others. Works across all languages.
What does the AI score mean?+
0–100% probability the text is AI-written. Below 20% is low risk. 20–50% is mixed. Above 70% indicates strong AI likelihood — rewrite those flagged sections.
Is my text stored?+
No. Your text is sent for analysis in real time and not stored, saved, or shared. Nothing is retained after you close the page.
Is it really free with no limits?+
Yes — no account, no daily limit, no credit card. Every feature including PDF reports is completely free.