What is a UUID?
A Universally Unique Identifier is a 128-bit label, usually written as hex with hyphens. Version 4 means the bits come from random data, which is ideal for unique keys without a central registry.
How to Generate UUID
- Choose how many UUIDs you need (up to 50 per click).
- Click Generate.
- Copy the list or clear and run again.
Use Cases
- Databases: primary keys and correlation IDs.
- APIs: request tracing and idempotency keys.
- Apps: unique filenames, sessions, and test data.
Example
550e8400-e29b-41d4-a716-446655440000
7c9e6679-7425-40de-944b-e07fc1f90ae7
FAQ
- What is UUID v4?
- It is the “random” variant: all digits except the version nibble are generated from random bits, which is what this tool produces.
- Is a UUID truly unique?
- Collisions are astronomically unlikely for practical purposes. You should still follow your database’s uniqueness rules.
- Is this tool free?
- Yes. SmartFlexa’s UUID generator is free with no signup.
- Is my data secure?
- UUIDs are created in your browser. They are not sent to our servers when you generate or copy them.
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