Unicode Cleaner
Reveal and clean hidden Unicode troublemakers locally, including zero-width spaces, BOM, NBSP, bidi marks, and control characters.
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Unicode CleanerPaste suspicious text.Keep the default cleanup options or adjust Unicode normalization.Review the report, then copy or download the cleaned text.
Quick Start
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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
Cleaning happens locally in your browser. Input can be kept as a local draft; generated output is not synced or uploaded by this tool.
FAQ
They are Unicode characters that may not be visible but still affect matching, search, copy, and parsing.
NBSP looks like a normal space but can break wrapping, matching, and import workflows.
Bidi marks can make text display in an order that differs from the stored character order.
No. It removes common hidden characters locally but does not detect every Unicode spoofing issue.