guillaumemeyer/watermarks-remover

What is it?

Key features

• 01Removes invisible Unicode, unusual spaces and bidi characters from text.
• 02Strips C2PA manifests and metadata from images, audio, video and documents.
• 03Exposes inspect, detect, clean and watermark endpoints over HTTP with an OpenAPI spec.
• 04Installs into Claude Code, Codex, Cursor and other agent hosts with one installer.
• 05Provides a PostToolUse hook that checks or cleans files the agent writes.
• 06Supports batch endpoints and published Docker images.

Use cases

• Removing provenance metadata from your own photos or documents before sharing them.
• Cleaning hidden characters from AI-assisted drafts of manuscripts or web copy.
• Adding a pre-commit or CI check that flags AI marks in repository files.
• Testing whether a text watermark survives a rewrite in controlled experiments.

Quick start

1. 1

   Clone the repository

2. 2

   Start the local HTTP service (Python 3.10+, no dependencies)

   make serve
3. 3

   Install the agent skill for Claude Code

   python3 install_skill.py --skill remove-ai-marks --target claude-code
4. 4

   Clean a file using the scripts

   python3 service/scripts/clean_file.py draft.md -o draft.cleaned.md

Things to know

• !The skill is a thin client and needs the Python service running at WATERMARKS_SERVICE_URL.
• !Statistical text watermark removal (Layer B) relies on agent rewriting and is best-effort.
• !Full PDF stripping requires the qpdf system tool, and c2patool and exiftool are optional extras.

Topics

FAQ

What is watermarks-remover?

Agent skill and Python service that strip AI provenance marks like C2PA metadata and invisible Unicode from your files. watermarks-remover is an agent skill backed by a stdlib-only Python HTTP service. It inspects and cleans text and files of AI provenance marks: invisible Unicode characters in text, and C2PA manifests plus EXIF, XMP or document metadata in images, PDFs, Office files, audio and video. The skill is a thin client, so the agent host does not need Python installed.

Is watermarks-remover free to use? What license does it have?

watermarks-remover is open source under the MIT license. Check the license terms before using it in commercial products.

Is watermarks-remover still maintained?

Actively maintained. The last commit to watermarks-remover was on Oct 17, 2026.

What can I use watermarks-remover for?

Removing provenance metadata from your own photos or documents before sharing them. Cleaning hidden characters from AI-assisted drafts of manuscripts or web copy. Adding a pre-commit or CI check that flags AI marks in repository files. Testing whether a text watermark survives a rewrite in controlled experiments.

How do I install watermarks-remover?

Clone the repository Start the local HTTP service (Python 3.10+, no dependencies): make serve Install the agent skill for Claude Code: python3 install_skill.py --skill remove-ai-marks --target claude-code Clean a file using the scripts: python3 service/scripts/clean_file.py draft.md -o draft.cleaned.md

Where can I get watermarks-remover?

The source code and installation instructions are on GitHub: https://github.com/guillaumemeyer/watermarks-remover