GitHub project with 11k stars strips AI watermarks from Claude, SynthID, and more

新智元 · wechat · 2026-08-17

A GitHub project called watermarks-remover has gone viral with over 11,000 stars. It removes text watermarks from Anthropic's Claude, Google's SynthID-Text, OpenAI's invisible markers, and also strips C2PA authentication data and EXIF metadata from images and PDFs. It uses a three-layer approach: cleaning invisible characters, rewriting text with a non-source model to break statistical watermarks, and stripping file metadata. It also includes pixel-level image watermark removal and MarkLLM verification. The project emerged in response to Anthropic watermarking all users to comply with EU AI Act, sparking backlash. Users report Claude refuses to remove its own watermarks, but Chinese models can do it easily.

Related event: Open-Source Tool Stripping AI Watermarks Goes Viral on GitHub with 11k Stars(2 posts)→

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