Detect AI Watermarks

Detect AI Watermarks is a free AI watermark detection tool that scans text for hidden Unicode characters and strips invisible metadata from images, catching the kind of markers that AI systems can leave behind. For text, it checks for 30+ invisible Unicode characters across seven categories, including zero-width characters, special spaces, variation selectors, directional marks, invisible operators, line and paragraph separators, and the byte order mark, so you can clean content before it breaks a CMS or trips a plagiarism check. For images, it removes EXIF, XMP, GPS, and IPTC metadata from JPEG, PNG, and WebP files. You can paste text or upload a file of up to 20,000 characters, and the scan runs entirely in your browser, so content never leaves your machine. The site frames four concrete workflows: publishing (preventing CMS errors from stray characters), education (checking academic integrity), development (debugging API responses), and content quality (cleaning text before accessibility tools read it). It is aimed at publishers, educators, developers, and content creators who need to verify text authenticity or scrub invisible data before sharing. For anyone comparing the best free AI watermark detector, the draw here is that it is free, requires no signup, and keeps processing local.

Finding and removing hidden Unicode characters in text and stripping metadata from images before publishing or submission.