Invisible Character Finder & Visualizer
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Text copy-pasted from a website or document sometimes carries invisible characters like zero-width spaces or non-breaking spaces that look completely normal but can silently break code, cause string comparisons to fail, or trip up form validation, and this invisible character finder makes them visible instantly. It scans pasted text for hidden Unicode characters and highlights exactly where they are, which is invaluable for developers debugging mysterious string mismatches, content editors cleaning up pasted web copy, and anyone troubleshooting a form field that keeps rejecting seemingly correct input. Instead of guessing what's wrong, you get a clear visual breakdown of every hidden character and its Unicode code point. Everything is analyzed locally in your browser, so the text you're debugging is never uploaded. Paste your text below to reveal any hidden characters instantly.
Features
- Detect zero-width spaces and zero-width joiners
- Detect non-breaking spaces and other invisible whitespace
- Highlight the exact position of hidden characters in text
- Display Unicode code points for each detected character
- Instant scanning with live results as you paste
- Option to strip detected invisible characters from output
- Works on text copied from web pages, PDFs, or documents
- No length limit on the text being scanned
Why use this invisible character finder & visualizer?
- Scans text instantly, revealing hidden characters immediately
- Runs entirely client-side, keeping debugged content private
- Accurately identifies a wide range of invisible Unicode characters
- Clear visual highlighting that pinpoints exact character locations
- Free to use with no signup or restrictions
Frequently asked questions
What are zero-width spaces and why do they cause problems?
Zero-width spaces are invisible Unicode characters that take up no visual space but still count as characters, which can break string comparisons, search matching, and form validation without any visible sign of a problem.
Why does text copied from a website sometimes have hidden characters?
Web pages and word processors sometimes insert invisible formatting characters like non-breaking spaces or zero-width joiners for layout purposes, and these get copied along with the visible text.
How can invisible characters break my code?
A hidden character in a variable name, string literal, or config value can cause a program to treat two visually identical strings as different, leading to confusing bugs that are hard to spot by eye.
Can this tool remove the invisible characters it finds?
Yes, alongside detection, the tool typically offers an option to strip out the detected invisible characters and give you clean text back.
What's the difference between a non-breaking space and a regular space?
A non-breaking space prevents a line break from occurring at that point, and while it displays like a normal space, it has a different Unicode code point that can cause matching or parsing issues.
Is my text uploaded anywhere when scanning for hidden characters?
No, the entire scan runs locally in your browser using JavaScript, and your text is never sent to a server.