Free Online Zero-Width Watermark
This tool hides a secret message inside a normal-looking piece of text by encoding it as invisible zero-width Unicode characters (U+200B and U+200C) wrapped in word-joiners. The carrier text reads exactly the same, but the hidden payload travels with it when you copy and paste. Switch to Reveal to extract a message from watermarked text. It is obfuscation, not encryption: anything that strips formatting or normalises Unicode will remove the mark, so never use it for passwords or sensitive data.
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How to use Zero-Width Watermark
- Type the visible carrier text.
- Type the secret message to hide.
- Press Embed and copy the watermarked text.
- To read it back, paste it into Reveal mode.
Questions about Zero-Width Watermark
Will the hidden message survive copy-paste?
Yes, through ordinary plain-text copy-paste, because zero-width characters are part of the string. But rich-text editors, social platforms and any tool that normalises Unicode or strips formatting can remove them, so always test on the destination.
Is this secure encryption?
No. It is steganography through obscurity — anyone who knows to look for zero-width characters can reveal the message. Use the AES encrypt/decrypt tool for real secrecy.
About Zero-Width Watermark
Hide zero-width watermarks inside text with our free online Zero-Width Watermark. 100% browser-based, fast, and private—no login or file uploads required.
These text and code tools clean and transform strings: count words, convert case, deduplicate lines, encode or decode Base64 and URLs, escape entities, hash, format JSON and compare two versions.
This tool runs in your browser. The file is not uploaded. Everything runs on the text you paste, so you can safely process snippets of code or logs; nothing is sent anywhere, and clearing the box removes it from memory.