Invisible watermark generator
Embed a hidden, keyed watermark into your text to prove ownership and track copies. Only someone with your key can verify it. Free, private, in-browser.
🔒 keyed — only you can verify
🔍 invisible — zero-width characters
🧹 removable — strip anytime
Watermark it
Add your text, a payload, and a key. The watermark is appended invisibly — copy and publish with confidence.
How it works
- Embed. Your payload is encoded as zero-width characters and appended invisibly to your text, obfuscated with your key.
- Publish. The text looks normal to readers — but carries your hidden mark.
- Verify. Anyone with your key can extract the payload to prove the text is yours.
- Remove. Paste watermarked text into the zero-width remover to strip the invisible characters.
Honest limits
- Watermarking text isn't proof in court — it's a practical ownership signal, not a legal seal.
- Heavy editing, reformatting, or copy-paste through some systems can drop the invisible characters.
- Keep your key secret: anyone with the key can both verify and strip the watermark.