Free — No Account Required
Free AI Checker & AI Detector — Detect AI-Generated Text
Identify content from ChatGPT, Claude, Gemini, and GPT-4 with real-time AI-powered forensic analysis. The most trusted free AI content detection tool.
99.1%Accuracy
2.4M+Scans Run
<2sAnalysis
6+AI Models
AI Content Analyzer0 / 1,000 words
Paste text & click Analyze to see results
Why aichecker.tech
Built for accuracy, not just speed
Multi-signal forensic analysis that goes beyond simple perplexity scoring to catch even lightly edited AI text.
Real AI Analysis
Powered by GPT-4o for state-of-the-art AI detection — not a rule-based heuristic or simple perplexity score.
Multi-Model Detection
Identifies output from ChatGPT, Claude 3.5, Gemini, Llama, Mistral, and more AI models in one pass.
Privacy First
Text is never stored or logged. Every AI check is stateless and ephemeral by design. Read our privacy policy.
5-Signal Breakdown
See perplexity, burstiness, sentence uniformity, transition patterns, and vocabulary signals. Learn how it works.
Academic Grade
Calibrated for academic writing. Our essay checker works on essays, research papers, dissertation chapters, and homework.
Plagiarism Scanner
Check text against billions of web pages with our free plagiarism checker. Get source URLs and match percentages.
Detection Coverage
Every major AI model covered
Our AI detector is continuously updated as new AI systems are released.
ChatGPT / GPT-4o
99.2% accuracy
Claude 3.5 / 3
98.8% accuracy
Gemini Pro / Ultra
98.4% accuracy
GPT-3.5 Turbo
99.5% accuracy
Llama 3 / 3.1
97.9% accuracy
Mistral / Mixtral
97.2% accuracy
Explore
AI Detection Tools
Specialized AI detectors for every use case.
AI Detector →
Our core free AI detector. Check any text for AI-generated content.
ChatGPT Detector →
Specialized detection for ChatGPT, GPT-4, and GPT-4o text.
Claude Detector →
Detect text from Anthropic Claude 3 and Claude 3.5 models.
AI Essay Checker →
Check essays and academic papers for AI-generated content.
AI Text Detector →
Analyze any text for AI writing patterns and signals.
Best AI Detector →
Compare top AI detection tools. Find the best option for your needs.
AI Detector for Teachers →
Free classroom AI detection tool for educators and professors.
How AI Detectors Work →
Learn the technology behind AI content detection.
FAQ
Frequently Asked Questions About AI Detection
Everything you need to know about our free AI checker and AI detector.
Our detection engine uses GPT-4o forensic analysis and achieves 99%+ accuracy on unmodified AI-generated content from ChatGPT, Claude, Gemini, and other major models. Accuracy may vary on heavily paraphrased or edited text.
Yes. aichecker.tech is 100% free with no account, no credit card, and no hidden limits. You can run unlimited checks on the free tier.
No. All analysis is completely stateless. Your text is processed in real-time and immediately discarded. It is never stored, logged, or used for any purpose beyond the immediate analysis.
An AI detector is a tool that analyzes text to determine whether it was written by a human or generated by an AI model like ChatGPT, Claude, or Gemini. It works by examining statistical patterns including perplexity (predictability of word choices), burstiness (variation in sentence length), vocabulary diversity, and structural patterns that differ between human and AI writing.
The best AI detector depends on your needs. aichecker.tech offers free, no-signup detection powered by GPT-4o with 99%+ accuracy. Other popular options include GPTZero, Originality.ai (paid), and Turnitin (institutional). aichecker.tech stands out for being completely free with no account required while maintaining high accuracy.
Yes. Modern AI detectors like aichecker.tech can detect text from ChatGPT (GPT-3.5, GPT-4, GPT-4o), Claude (Claude 3, Claude 3.5 Sonnet, Opus), Gemini, Llama, Mistral, and other major models. Each model has characteristic writing patterns that detection engines can identify.
Teachers and professors commonly use Turnitin (integrated into LMS platforms), GPTZero, and free tools like aichecker.tech. Many educators prefer free options that don't require student accounts. aichecker.tech is increasingly popular because it requires no login and provides detailed forensic analysis.
Top AI detectors achieve 95-99% accuracy on unmodified AI-generated text. Accuracy decreases with heavily edited or paraphrased content. No AI detector is 100% perfect, and false positives can occur, especially with non-native English writers or highly formulaic academic writing. aichecker.tech provides confidence scores to help you interpret results.
Turnitin uses its own proprietary AI detection technology developed in-house. It analyzes writing patterns at the sentence level to identify AI-generated content. Turnitin's AI detector is integrated into their plagiarism detection platform used by universities worldwide. For a free alternative with similar accuracy, try aichecker.tech.
Yes. aichecker.tech offers a completely free AI essay checker that works on any academic writing including college essays, research papers, dissertations, and homework assignments. No account or credit card is needed. Simply paste your essay text and get instant AI detection results with a detailed breakdown.