Invisible characters are Unicode characters that don't display visually but exist in text. They include zero-width spaces, non-breaking spaces, byte order marks, and various formatting characters. These can cause subtle bugs in code, break string comparisons, and create issues when copy-pasting text.

This detector identifies all invisible characters in your text, shows their Unicode code points and names, and provides a cleaned version with them removed.

Common Invisible Characters

Zero-Width Space (U+200B)

Takes no space but can break word matching and cause string comparison failures.

Non-Breaking Space (U+00A0)

Looks like a regular space but prevents line breaks. Common in copy-pasted web content.

Byte Order Mark (U+FEFF)

Used at the start of files to indicate encoding. Can cause parsing issues in code.

Common Problems Caused

Problem	Cause
String comparison fails	Hidden characters in one string
JSON parse errors	BOM at file start
Display glitches	RTL/LTR marks in mixed content

FAQ

Where do invisible characters come from?

Often from copy-pasting web pages, Word documents, PDFs, or text edited on different operating systems.