How to remove Claude's watermark from Gmail
To send a Claude-drafted email without the watermark, rewrite the text through a non-watermarking model before pasting it into Gmail, because Gmail sends your exact words. The watermark is carried in the wording, so it reaches the recipient unless you break it first.
What Gmail does with Claude's watermark
Gmail preserves pasted text and sends it as written. Short emails carry little statistical signal, so the watermark is weakest here — but longer emails, templates, and outreach sequences carry enough to matter. Gmail adds no watermark of its own.
Steps to clean it
- 1Paste your Claude text into ClaudeRewrite. It rewrites the wording through a non-watermarking model (DeepSeek V4 Flash), breaking the statistical pattern while preserving every fact, number, name and link, then strips any leftover invisible characters.
- 2Paste the cleaned text into Gmail with Cmd/Ctrl+Shift+V to drop hidden styling.
- 3For repeated templates and sequences, clean the template once and reuse it.
FAQ
Is a short email watermarked?
Barely. The statistical watermark needs enough text to register, so a two-line email carries little to no detectable signal. Longer emails and templates do.
Remember: Claude's watermark is statistical — it lives in the word choices, so it travels with your text into Gmail no matter how you paste. There is no public detector today, but published text stays checkable once Anthropic's detection API ships. See which models are marked →