I Hate Watermarks

I Hate Watermarks is a free, open-source web tool that shows hidden characters in pasted text, highlighted in place with their names and code points, then gives you a cleaned copy to copy or download. It removes zero-width characters, byte-order marks, soft hyphens, direction overrides, Unicode tag characters and unusual spaces, with optional settings for lookalike letters and NFKC normalization. Everything runs in your browser, and an agent skill brings the same engine to coding agents.