AI Detector – Free AI Checker: Fast, Accurate & No Sign-Up
AI Text Detector<br>We analyze linguistic patterns to detect AI-generated text — showing you not just a score, but the why behind every verdict. No black boxes. No guesswork. 99.5% accuracy.
0 / 5000 words<br>Detect AI
AI wrote it. We’ll catch it<br>// FACTS ONLY — NO VECTOR VIBES
Lightning Fast<br>Results in under 10 seconds — even for long articles and research papers
No Limits<br>Unlimited checks. No hidden fees, no paywalls, no surprise limits
Real Linguistic Analysis<br>We don't just guess. We use proven linguistic techniques
Detects 10+ AI Models<br>GPT-5.5+, Claude 4.7+, Gemini, LLaMA, DeepSeek, Mistral, and others
100% Private<br>Your text is transmitted encrypted and never stored permanently
Premium: PDF Report<br>Get a detailed report with highlights, scores, and methodology breakdown
Analysis Results<br>How It Works<br>Get detailed, sentence-by-sentence analysis with color-coded results in seconds
Example Results<br>ResultsPremium Details
High AI Probability Detected<br>2.4s<br>3 sentences
Overall Score87.3%AI-Generated
AI (70-100%)
Mixed (40-69%)
Human (0-39%)
Sentence-by-Sentence Analysis<br>Artificial intelligence has revolutionized numerous industries by automating complex tasks.
92.4%<br>Likely AI
However, this rapid technological advancement raises important ethical considerations.
54.1%<br>Mixed
My grandmother always said, "Technology is a tool, not a replacement for human judgment."
18.7%<br>Likely Human
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Get Started<br>Everything you need<br>Unlimited text analysis<br>Sentence-by-sentence breakdown<br>25+ detection methods<br>Batch processing (up to 100 files)<br>Export to PDF<br>Historical data retention<br>Priority queue
Testimonials<br>What real users say
From students to professors, writers to business owners
"I was paranoid my own essays would get flagged as AI because I use Grammarly. This tool gave me peace of mind. It showed my writing is fine."
Jessica M.<br>Senior, Michigan State
"My friend got accused of using ChatGPT. I ran his paper through this and it came back clean. He showed it to the professor and they dropped the case."
Tyler R.<br>Freshman, Community College
"I use it to double check my discussion posts before submitting. It caught a few sentences that sounded weird. Rewrote them and felt much better."
Amanda K.<br>Grad Student, NYU
"Some AI checkers say everything is AI. This one is more balanced. It correctly identified my original work as human. That's rare."
Carlos G.<br>Undergrad, UCLA
"I need evidence before I talk to a student about potential AI use. This tool gives me sentence level feedback that I can actually use in a conversation."
Dr. Laura H.<br>English Professor
"Our department tried three different detectors. This was the only one that didn't cause a ton of false positives."
Michael S.<br>High School Teacher
"Editors are getting strict about AI. I check everything before I hit send. This detector has never let me down. No false flags."
Rachel P.<br>Freelance Journalist
"I run client submissions through this. It catches AI content that other tools miss. My clients appreciate the extra quality control."
David L.<br>Copy Editor
"I hire writers for my blog. One guy was clearly using AI but charging human rates. This detector proved it. Saved me hundreds of dollars."
Nina T.<br>Small Business Owner
"The tool my university was using kept flagging real student work. This one doesn't. Made my case to the department chair."
Patricia M.<br>Professor, Community College
"Tried a few other tools. They kept telling me my human-written papers were AI. Frustrating. This one actually gets it right most of the time."
Daniel P.<br>PhD Candidate, History Department
"After testing against thousands of samples, this detector had the lowest false positive rate."<br>Independent user study
Research & Methodology<br>Built on peer-reviewed science
Our detection engine uses validated linguistic metrics from leading academic institutions
Perplexity
Measures text predictability. Lower perplexity indicates higher likelihood of AI generation.<br>Source: Academic Radiology (Elek et al., 2025)<br>Median perplexity: Human 35.9 vs AI 21.2 (AUC=0.7794)
Burstiness
Analyzes sentence variation. Human writing has higher variability in length and structure.<br>Definition: "Burstiness refers to the variation in sentence structure and length. Human writing naturally has...