Generate version-4 UUIDs backed by the browser's cryptographic random source — one at a time or in bulk for seeding databases and fixtures.
How it works
- Enter the total number of UUIDs you want to generate in bulk (e.g., 1 or 500).
- The browser's local cryptographic engine calculates completely random v4 UUIDs.
- Copy the resulting list to use as primary keys or database seeds.
Frequently asked questions
Can two randomly generated UUIDs collide?
Theoretically yes, but practically impossible. You would need to generate billions of UUIDs per second for decades to even expect a single collision.
What is the difference between UUID v4 and v7?
Version 4 is pure cryptographic randomness. Version 7 embeds a timestamp to allow database-friendly sorting, though v4 remains the universal standard.
Are these secure enough for session tokens?
While the randomness is highly secure, purpose-built session tokens containing significantly more entropy are still the standard for auth architectures.