Create test identifiers
Generate UUIDs for local development, mock data or database seed records.
About UUID Generator
UUID Generator creates random version 4 UUID values for development, test data and identifiers.
Common use cases
Assign online IDs
Create unique-looking identifiers for items before a server assigns its own permanent key.
Prepare API examples
Produce sample UUID values for documentation, forms or integration testing.
How it works
1
The browser requests random values from its cryptographic random source where available.
2
Those random bits are arranged into the standard UUID textual format.
3
A new identifier is displayed without contacting a remote ID service.
Privacy & file handling
UUID generation is local
UUID values are created in the browser and do not require a request to Zavilo.
Limitations and important notes
- A randomly generated UUID is an identifier, not a secret token or proof of identity.
- Uniqueness is probabilistic, although collisions are extremely unlikely with properly generated UUID v4 values.
- Some systems require a specific UUID version or format; confirm the destination requirements.
UUID vs sequential ID
| Feature | Strength | Tradeoff |
|---|---|---|
| UUID | Can be generated independently without central coordination | Longer and less human-friendly |
| Sequential integer | Compact and easy to read | Usually requires centralized allocation |
How to use UUID Generator
- 1
Choose how many UUIDs you need.
- 2
Click Generate.
- 3
Copy the generated UUID list.
Tips for better results
- You can generate up to 100 values at once.
- Each value uses the standard UUID v4 format.
Frequently asked questions
Which UUID version is generated?
The tool generates random UUID version 4 values.