UUID Generator
Generate cryptographically random UUIDs right in your browser, for database keys, IDs and anything else you need.
How to generate UUIDs
- Set how many UUIDs you need, up to a maximum of 100.
- Pick a format: standard v4, uppercase, or v1-like time-ordered.
- Optionally remove hyphens for compact identifiers.
- Click Generate, then copy the list or download it as a .txt file.
FAQs
What is a UUID?
A UUID is a 128-bit identifier formatted as 36 characters with hyphens. Version 4 UUIDs are generated from random numbers and are practically unique.
Are the generated UUIDs random?
Yes. The tool uses the browser's crypto random number generator, which is designed for strong randomness, so collisions are virtually impossible.
What is a v1-like UUID?
v1-like UUIDs embed a timestamp, so they increase over time and sort in the order they were created. Handy for database indexes.
Is the generator free?
Yes. Every Handio tool is free, with no sign-up, no limits and no data leaving your browser.
Related Tools
Why generate UUIDs?
UUIDs give every record a practically unique identifier without a central authority or counter. They are ideal for database keys, tracking IDs and anything that must not collide.
- Create unique IDs for database records or distributed systems.
- Generate tracking or session identifiers for analytics and apps.
- Batch-generate identifiers for test fixtures and seed data.
Tips and Limits
v4 UUIDs are random and practically collision-free, while v1-like UUIDs are time-ordered and sort well in indexes. Generation uses the browser's crypto random source and never leaves your device.