UUID v4 Generator
Generate cryptographically secure random UUID v4 identifiers
Instant Results
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No Registration
Why Use Our UUID v4 Generator?
Cryptographically random
RFC 4122 compliant
Globally unique
Database-friendly
Technical Details
Version: 4 (random)
Format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
Total bits: 128 (122 random)
Possible values: 5.3 × 10^36
Common Use Cases
Database Primary Keys
Generate unique identifiers for database records without coordination.
API Request IDs
Track requests with unique IDs for logging and debugging.
Session Tokens
Create unique session identifiers for user sessions.
File Naming
Generate unique names for uploaded files to prevent conflicts.
Pro Tips
- Version 4 UUIDs are completely random
- The "4" in the third group indicates version 4
- The first character of the 4th group is always 8, 9, a, or b
Example
Input
Generate 1
Output
f47ac10b-58cc-4372-a567-0e02b2c3d479
Frequently Asked Questions
Version: 4 (random)
Your data stays in your browser
All processing happens locally. Nothing is sent to any server.