Unicode Studio
Detect hidden threats, build test strings, and explore 66+ attack patterns
7
Threat Categories
66+
Attack Patterns
70+
Special Characters
4-in-1
Security Toolkit
Editor
Cursor: 0
Preview (Marked)
Start typing or insert special characters...
Total: 0
Legend:โ๏ธBidiInvisibleโกControlโฬCombiningะฐHomoglyph
Threat Detection
Analyze text for Trojan Source attacks, bidirectional exploits, and hidden characters.
String Builder
Craft test strings with special characters for security testing and research.
Attack Library
Browse 66+ real-world attack patterns across 7 categories.
Text Sanitizer
Clean dangerous characters from text while preserving safe content.
About Unicode Security Threats
Unicode contains thousands of characters, many of which can be exploited for malicious purposes. Common attacks include:
- Bidirectional (Bidi) attacks: Using RLO/LRO to reverse text display, hiding malicious file extensions
- Zero-width characters: Invisible characters used for text watermarking or filter bypassing
- Homoglyph attacks: Using look-alike characters from different scripts for phishing
- Combining characters: Excessive diacritical marks creating "Zalgo text" for UI disruption