How to use UUID Generator
- Choose how many UUIDs you need.
- Generate.
- Copy the identifiers into your app or spreadsheet.
Worked examples
Concrete numbers and cases you can check against the tool above.
Ten IDs for a fixture file
UUID v4 values look like 550e8400-e29b-41d4-a716-446655440000. Generate a handful, paste into JSON, and never reuse the same ID across environments if the column is a primary key. These are random, not sequential, so they do not leak how many rows you have.
When to use UUID Generator
Distributed systems and databases rely on unique IDs. Generating UUID v4 values locally is handy for fixtures, primary keys, and correlating test events.
Common use cases
- Seed database rows during local development.
- Create request IDs for API debugging notes.
- Generate bulk IDs for import templates.
- Assign unique keys to offline form drafts.
Inputs and outputs
- UUID version 4 strings (8-4-4-4-12 hex format)
Privacy
This tool runs entirely in your browser. Your data never leaves your device — nothing is uploaded to our servers.
Frequently asked questions
- Are UUIDs unique?
- UUID v4 values are randomly generated with extremely low collision probability for normal use.
- Do you log generated IDs?
- No. Generation happens locally and is not stored by us.
- Can I generate bulk UUIDs?
- Yes. Select a count and generate a list.