UUID v4 Generator
Generate random UUID (version 4) values instantly using secure browser cryptographic randomness. Copy with one click.
Generated entirely in your browser. No UUIDs are stored or transmitted.
How it works
This tool generates UUID version 4 values using the browser’s secure cryptographic APIs:
crypto.randomUUID() or crypto.getRandomValues().
- Version: UUID v4 (random-based)
- Format: 8-4-4-4-12 hexadecimal characters
- Source of randomness: Cryptographically secure browser APIs
No server-side generation is used.
Examples
- Sample UUID: 550e8400-e29b-41d4-a716-446655440000
- Use UUIDs as database primary keys
- Generate GUIDs for test data or APIs
FAQ
- What is a UUID? A Universally Unique Identifier used to uniquely identify records or resources.
- Is UUID v4 secure? It uses random numbers from cryptographically secure sources, suitable for most development use cases.
- Is this the same as a GUID? Yes. GUID and UUID are often used interchangeably.
- Are generated UUIDs stored? No. Everything runs locally in your browser.
- Can collisions happen? The probability is extremely low due to 122 random bits in UUID v4.