Invisible Character Detector
Detect hidden and invisible characters in text
Invisible Character Detector is a free online tool from BrowserUtils that detect hidden and invisible characters in text. It runs entirely in your browser — your data never leaves your device. No account required.
How to use Invisible Character Detector
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About Invisible Character Detector
Free online invisible character detector. Find zero-width spaces, non-breaking spaces, and other hidden Unicode characters lurking in your text. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
Invisible Character Detector specs
- Runtime
- 100% client-side (browser)
- Built on
- Native JavaScript String, Intl.Segmenter, and RegExp APIs with full Unicode support
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
What invisible characters can this detect?
This tool detects zero-width spaces (U+200B), zero-width non-joiners (U+200C), zero-width joiners (U+200D), non-breaking spaces (U+00A0), soft hyphens (U+00AD), and many other invisible or control characters.
Why would invisible characters appear in my text?
Invisible characters are often introduced by copy-pasting from websites, word processors, or PDFs. They can also be added intentionally for text direction control or to bypass content filters.
Can invisible characters cause bugs in my code?
Yes, zero-width characters can cause string comparisons to fail, break JSON parsing, and create hard-to-debug issues. This tool helps you find and remove them.
Does the detector show where invisible characters are located?
Yes, each invisible character is highlighted in the text with its Unicode name and code point, so you can see exactly where it appears and decide whether to remove it.
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