UUIDs (v4)
How to Use UUID Generator
1
Set how many UUIDs you need (1–100).
2
Choose the format: standard, no hyphens, uppercase or braces.
3
Click Generate and copy all.
Features
✓RFC 4122 compliant UUID v4
✓Server-side PHP random_bytes() — truly random
✓Up to 100 UUIDs at once
✓4 output formats
✓Copy all with one click
Why Use This Tool
Use as unique database primary keys
Generate test data identifiers
Avoid UUID collisions with proper v4 generation
No library installation needed
Frequently Asked Questions
What is UUID v4?
UUID v4 is a randomly generated 128-bit identifier following RFC 4122. It has 2^122 possible values — practically impossible to collide.
Is JavaScript Math.random() used?
No. PHP random_bytes() uses the operating system's cryptographically secure random source.