★ Free Developer Tool
UUID Generator
Generate random version 4 UUIDs, one or many at a time.
Loading the tool…
Runs entirely in your browser. Your files and text are never uploaded to our server.
About this toolUUID Generator creates random unique identifiers for database keys, test data and file names, using your browser's secure random generator.
Learn more - Instant results
- 100% free
- No sign-up
- Private
UUID Generator creates random unique identifiers for database keys, test data and file names, using your browser's secure random generator.
More about UUID GeneratorHow to use, good to know & FAQ
How to use UUID Generator
- Choose how many UUIDs you need and the format.
- Click "Generate" and copy them.
Frequently asked questions
Can two UUIDs be the same?
In practice no. There are about 5.3 x 10^36 possible version 4 UUIDs.
Are UUIDs really unique?
UUID v4 uses 122 random bits, so collisions are practically impossible.
What is the difference between UUID and GUID?
They are the same idea; GUID is Microsoft’s name for a UUID.
When to use UUID Generator
- Create primary keys for database records
- Generate IDs for test data
- Tag requests for logging and tracing
- Name files or objects uniquely
📘 Read the guide: JSON Formatting & Validation: A Beginner’s Guide With Examples