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🔍 Free AI Detector • Sentence-by-Sentence Heatmap • Zero Limits

AI Content Detector & Authenticity Checker

Detect text generated by ChatGPT (GPT-4o, GPT-4), Claude 3.5, Gemini, and DeepSeek with sentence-level perplexity heatmaps and burstiness analysis.

Try Preset Sample:
67 words • 505 characters100% Private Client-Side Analysis
Content Authenticity Verdict

Highly Likely AI Generated

Human: 2% AI: 98%
Perplexity Index
58 / 100

Higher = More unpredictable (Human)

Burstiness Score
30%

Sentence length variation rhythm

Vocab Diversity (TTR)
90%

Unique words vs total words

Avg Sentence Length
17 words

Words per sentence average

Sentence-by-Sentence AI Heatmap

Human (<40%) Mixed (40-70%) Likely AI (>70%)
In today's fast-paced digital landscape, artificial intelligence plays a crucial role in shaping our future.98% AI
AI Cliché Detected:crucial rolein today's fast-paced
It is important to remember that this transformative technology serves as a testament to human ingenuity.98% AI
AI Cliché Detected:testament totransformativeit is important to remember
Furthermore, by delving into the rich tapestry of modern machine learning algorithms, organizations can seamlessly integrate automated systems to foster innovation and navigate emerging complexities.98% AI
AI Cliché Detected:tapestryfurthermorerich tapestryseamlessly integrate
In conclusion, embracing this multifaceted approach is paramount for sustainable progress.98% AI
AI Cliché Detected:in conclusionmultifacetedparamount
Analysis complete for 4 sentences

How It Works

Simple, fast, and 100% secure in 3 steps.

1

Paste Your Text

Paste any student essay, blog post, article draft, or email into the analyzer.

2

Instant Linguistic Analysis

Our multi-dimensional engine calculates vocabulary perplexity, burstiness rhythm, and AI cliché frequency.

3

Review Visual Heatmap

Inspect sentence-by-sentence highlights indicating exact phrases that trigger AI detection.

100% Free Forever
Client-Side Privacy
Zero Server Uploads
No Registration Needed

Key Features & Capabilities

Designed for accuracy, privacy, and maximum efficiency.

Perplexity & Predictability Mapping

Measures how likely words follow statistical token distributions common in Large Language Models.

Burstiness Rhythm Tracking

Human writing naturally alternates between short punchy sentences and long complex clauses; AI remains unnaturally uniform.

Telltale AI Cliché Detection

Instantly flags overused AI words like 'delve into', 'testament to', 'tapestry', and 'furthermore'.

Frequently Asked Questions

Everything you need to know about using this tool.

Our detector evaluates multiple linguistic layers including Perplexity, Burstiness (sentence length variance), Type-Token Ratio (vocabulary richness), and n-gram cliché frequency. For texts over 50 words, accuracy exceeds 94% across ChatGPT, Claude 3.5, Gemini, and DeepSeek outputs.

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AI Detector [Free] — Check ChatGPT & GPT Content Instantly