Content detection
39 free Content detection tools, ranked by recommendation. How to use each free and whether signup is needed is on its detail page; always follow the official site.
Free only · 39 tools
ScanSkinAI
Free AI skin scanner that can analyze moles and detect skin cancer. Medical-grade AI covers over 31 types of diseases.
AI Image Detector
Multiple AI detection models are cross - checked, combined with C2PA credentials and metadata forensics, to give a graded conclusion.
ChatGPT Watermark Remover
A free online tool that can instantly detect and remove AI watermarks and zero-width characters, which is safe and fast.
GPTVerify
Free AI detector that can identify AI-generated, rewritten, and human-written text, with sentence-level explanations.
OmniDetect
Free AI detector. Scan once and cross - reference multiple engines to determine whether the content is generated by AI.
isgen.ai
Leading Chinese AI detector that can detect multi-model text and supports over 80 languages
GPTCLEANUP
A free ChatGPT text cleaning tool that removes hidden characters, adapts to documents, and requires no registration.
AI Humanizer Benchmark
An open-source benchmark for AI humanizer tools, evaluating the comprehensive performance of 11 tools against 7 types of AI detectors every month.
TextSight
Detects AI-generated content, provides authenticity scores and one-click rewrite suggestions, offering one-stop writing optimization