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Unicode Cleaner

Clean hidden Unicode characters locally, including zero-width spaces, BOM, NBSP, bidi marks, unsafe controls, and optional NFC/NFKC normalization.

Input text

Characters

0 / 50,000

Cleaned text

Stats

Removed 0NBSP replaced 0
Unicode Cleaner

Quick Start

1
Paste suspicious text.
2
Keep the default cleanup options or adjust Unicode normalization.
3
Review the report, then copy or download the cleaned text.

Common Scenarios

Fix JSON, YAML, CSV, or code snippets that fail because of hidden characters.

Clean text copied from PDFs, chat tools, CMS fields, or documents.

Remove bidi marks before reviewing text that may hide misleading order.

Character Types

Zero-width characters can make text look identical while comparing differently.
NBSP looks like a space but behaves differently in wrapping and matching.
Bidi marks can change visual order without changing stored text order.

Usage Advice

Use the report to confirm what was changed before replacing source text.
Use NFC for common accent composition; use NFKC only when compatibility folding is acceptable.
Keep a copy of original text when cleaning security-sensitive content.

Limitations & Compatibility

This is not a malware scanner, homoglyph detector, or full Unicode security audit.
Normalization can change how equivalent characters are stored.
Line breaks and tabs are preserved; unsafe controls are removed.

Privacy & Security

Unicode cleanup runs locally in your browser. The editor input may stay as a browser draft, and cleanup options may be kept in browser storage. If saved workspaces or WebDAV sync are enabled, the same input and options may be saved through that sync. Cleaned text, reports, and TXT downloads are regenerated from the current input and options; this tool does not upload files or attachments.

FAQ

6

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