🔎

Hidden Character Detector

textClient-side utility

Invisible characters — zero-width spaces, non-breaking spaces, byte-order marks, stray control codes — can silently break code, corrupt CSV imports, or make two "identical" strings fail comparison. They are impossible to spot by eye. The Hidden Character Detector scans your text and lists every suspicious character with its exact position and Unicode code point, naming common ones like ZWSP (U+200B), ZWNJ, ZWJ, and NBSP. Paste text copied from the web, PDFs, or chat apps and click Detect to see what is hiding inside. Everything runs locally in your browser using client-side JavaScript. The tool does not intentionally send your text to our servers.

✓ In-Browser Execution✓ Free & No Usage Cap✓ Zero Server Data Storage

🔎 Hidden Character Detector

Find invisible and zero-width characters (ZWS, NBSP, BOM, etc.) hiding in your text. Free, private, runs in your browser.

Text

Result

Click Detect...

📖How to Use This Tool

What is Hidden Character Detector?

This tool inspects each character of your input and flags anything invisible or non-printing: control characters below code point 32, the DEL character (127), ranges 8192–8207 and 65279–65295, and specific culprits like the zero-width space (U+200B), zero-width non-joiner, zero-width joiner, non-breaking space (U+00A0), and the byte-order mark (U+FEFF).

For every match it reports the character's position, its code point in U+XXXX form, and a short name (ZWSP, ZWNJ, ZWJ, NBSP, or UNKNOWN for the rest). If nothing suspicious is found, it plainly says "No hidden characters found."

How to use it

Paste the suspicious text into the Text box.
Click Detect.
Read the Result area: each flagged character appears as a line like Pos 12: U+200B (ZWSP).
Use the position numbers to locate and remove the offending characters in your original text.

Why use this over alternatives

Hex editors and programmer tools can show these characters, but they are overkill for a quick paste-and-check. This detector names the usual suspects in plain language and pinpoints positions, so cleanup is fast. It runs locally in your browser using client-side JavaScript. The tool does not intentionally send your text to our servers.

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❓Frequently Asked Questions

Q.Which characters does it flag as hidden?

It flags control characters (code points below 32), DEL (127), the ranges U+2000–U+200F and U+FEFF–U+FFFF, plus specific characters: zero-width space (U+200B), zero-width non-joiner (U+200C), zero-width joiner (U+200D), non-breaking space (U+00A0), and the byte-order mark (U+FEFF).

Q.What do the names ZWSP, ZWNJ, ZWJ, and NBSP mean?

ZWSP is the zero-width space (U+200B), ZWNJ the zero-width non-joiner (U+200C), ZWJ the zero-width joiner (U+200D), and NBSP the non-breaking space (U+00A0). Less common flagged characters are labeled UNKNOWN, but their exact code point is still shown so you can look them up.

Q.Does it remove the hidden characters for me?

No — it only detects and reports hidden characters with their positions and code points. You remove them yourself in your editor, using the reported positions as a guide. This keeps you in control, since automatic removal could alter text you wanted to keep.

Q.Is my pasted text sent to a server?

No. Detection runs locally in your browser using client-side JavaScript, scanning each character's code point against the flagged ranges. Nothing leaves your device during the scan. The tool does not intentionally send your text to our servers.

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