Free UUID Generator, Create Version 4 UUIDs Instantly

Every database row, API resource, or distributed system object often needs a unique identifier that won't collide with any other, even across different servers generating IDs independently. The UUID Generator produces standards-compliant version 4 UUIDs instantly.

What this tool actually does

• Generates random, RFC 4122-compliant version 4 UUIDs
• Supports generating multiple UUIDs at once for bulk use
• Copy individual UUIDs or the full generated list with one click

How to use it, step by step

1. Open the UUID Generator.
2. Choose how many UUIDs you need.
3. Copy the generated UUID(s).

Why UUIDs matter in software development

Auto-incrementing integer IDs work fine for a single database, but they collide the moment two systems generate IDs independently, for example when merging data from separate services or when a client generates an ID before it's ever saved to a server. UUIDs are designed so that two randomly generated ones are, for all practical purposes, never the same, making them safe to generate anywhere without central coordination.

Common use cases

• Generating unique primary keys for database records
• Creating unique identifiers for API resources or session tokens
• Tagging distributed system events with a globally unique ID
• Generating test data that needs unique identifiers

Frequently asked questions

What's the chance of two generated UUIDs colliding?

For version 4 UUIDs, the probability of a collision is astronomically small, small enough that it's treated as effectively zero in practical software design.

Can I generate multiple UUIDs at once?

Yes, specify how many you need and copy the full list at once.

Try it yourself

Grab a fresh UUID from the UUID Generator next time your code needs one.