Unicode Cleaner

How to remove invisible Unicode characters from text

To clean invisible Unicode, paste your text into Unicode Cleaner and it scans for zero-width spaces, the BOM, direction marks, and other invisible or special characters, then strips them out. It also normalizes non-breaking spaces and the Unicode form so the cleaned text behaves consistently. The visible characters stay the same, only the hidden, structurally troublesome ones are removed.

This is useful because text copied from PDFs, chat apps, AI tools, or design software often hides characters you cannot see. Those hidden characters break search, diffs, validation, code, and database imports, and they are nearly impossible to catch by eye. Unicode Cleaner makes the text safe to paste anywhere.

When the cleanup is done you can copy the normalized result straight back out. The whole process runs locally in your browser, so even sensitive or unpublished text never leaves your device.

• Text pasted from PDFs that carries hidden formatting marks
• AI or chat output that includes zero-width characters
• Code, CSV, or config values that fail validation for no visible reason
• Database and CMS imports that break on invisible characters

How is this different from typography cleanup?

Unicode Cleaner focuses on invisible or structurally troublesome Unicode characters, not on visible punctuation styling. If you want to convert curly quotes, em dashes, or other visible smart punctuation, that is a different job handled by a smart quotes cleaner instead.

Because it targets hidden characters, Unicode Cleaner is the right tool when text looks correct on screen but misbehaves in systems, failing a comparison, breaking a regex, or corrupting an import. It removes the cause without altering the words you actually see.