AI Detector
Check AI-written text before you publish
Paste up to 5,000 characters and get an instant AI likelihood estimate. Review drafts, SEO copy, essays, and client content before moving into the full app workflow.
Detection score
High likely AI
0%
Low-perplexity sentences with the strongest AI signal.
Likely AI
0%
Sections that may need a human editing pass.
Highlighted preview
Need saving, exports, or a larger workflow? Continue in the full app after your first check.
Open full AI Detector in appThe Most Accurate AI Content Detector
Verify authenticity in seconds. Our multi-layered forensic analysis identifies ChatGPT, Claude, Gemini, and Llama footprints with 99.8% precision.
[Checking Burstiness...]
[Pattern Match Found: 0.02% Human]
Advanced Linguistic Fingerprinting
Why You Need AI Detection in 2026
As AI models become more sophisticated, distinguishing between human creativity and machine-generated text has become nearly impossible for the human eye. The SEOCraft AI Detector uses deep learning architectures to analyze perplexity and burstiness—the two key metrics that define human writing.
Whether you are an editor, a teacher, or an SEO specialist, our tool ensures your content ecosystem remains authentic, protecting your site from "low-quality" flags by Google's search algorithms.
Model Attribution
Not just "AI or Human." We tell you if it was likely written by GPT-4, Claude 3.5, or Gemini Pro.
Spam Protection
Identify mass-produced AI content that could trigger Google's helpful content penalties.
Batch Scanning
Upload entire documents or scan hundreds of URLs simultaneously for enterprise-level audits.
The Science of AI Detection: Perplexity and Burstiness
Our algorithm focuses on two primary linguistic markers that AI models find difficult to replicate perfectly:
1. Perplexity: This measures the randomness of a text. AI models are built to predict the most likely next word, which results in low perplexity. Human writing is naturally more "surprising" and less predictable.
2. Burstiness: Humans tend to write in "bursts"—a mix of long, complex sentences followed by short, punchy ones. AI often maintains a very steady, monotonous rhythm. Our detector maps these variations to give you a definitive score.
Protect Your SEO Ranking
Google’s 2024 and 2025 core updates have made one thing clear: content that doesn't add unique value is demoted. If your site is flooded with unedited AI text, your "Topical Authority" suffers. By using the SEOCraft AI Detector, you can audit your content creators and ensure that every piece of text on your domain has been sufficiently "humanized" and edited for quality.
Is your content truly yours?
Join 50,000+ professionals using SEOCraft to verify authenticity.
Scan Your First 1,000 Words Free