UUID Generator
Generate v1, v4, and v7 UUIDs in bulk with format options.
Output
About UUID Generator
The UUID Generator instantly creates universally unique identifiers (UUIDs) for your database records, API payloads, and testing mocks. It supports bulk generation of v1 (time-based), v4 (random), and v7 (time-sorted) UUIDs.
How to Use
Real-World Examples
Database Primary Keys (UUID v7)
Generate time-sorted UUID v7s, which provide the uniqueness of v4 but are optimized for clustered database indexing.
Best Practices
- Use UUID v4 for general-purpose, highly random identifiers (e.g., API keys, session IDs).
- Use UUID v7 when using UUIDs as primary keys in relational databases (like PostgreSQL) to prevent index fragmentation.
Pro Tips
You can generate thousands of UUIDs at once to use as mock data for load testing.
Frequently Asked Questions
What is the difference between v4 and v7?
v4 is entirely random. v7 includes a Unix timestamp at the beginning, meaning they are chronologically sortable, which is better for database performance.
Is my data secure?
Absolutely. All processing is done locally in your browser. Your data is never sent to our servers.
Security & Privacy
UUIDs are generated entirely client-side using the secure `crypto.randomUUID()` API. No generated IDs are ever logged or transmitted, ensuring absolute collision privacy.