Zero-Width Character Detector — Free Online Tool
Scan text for hidden zero-width and invisible Unicode characters — often used in plagiarism detection watermarks, social engineering, and fingerprinting. Detects Zero Width Space, Zero Width Joiner, BOM, directional marks, and more. Outputs cleaned text.
100% client-side. No uploads. Your data never leaves your browser.
How to use Zero-Width Character Detector
- Paste suspicious text.
- Click Scan.
- See detected hidden characters and download the cleaned version.
Frequently Asked Questions
Why would text have hidden characters?
Publishers and platforms sometimes add invisible watermarks to identify copies. Malicious actors use them to bypass filters or hide text.
Is Zero Width Joiner the same as Zero Width Space?
No. ZWJ (U+200D) joins characters (used in emoji sequences). ZWS (U+200B) is a potential line break point. Both are invisible.
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