UUID Generator — free online tool
Generate version-4 UUIDs for database primary keys or correlation IDs—bulk mode helps seed test fixtures.
When to use UUID Generator
Mint unique IDs for database rows, test fixtures, and idempotency keys during development.
Useful when you want a quick answer without pasting sensitive data into random chat bots.
What UUID Generator does not do
UUID v4 is unique, not secret. Do not use as API keys or session tokens.
How to use UUID Generator
- Choose how many UUIDs you need on the UUID Generator.
- Click generate for random version-4 identifiers.
- Copy one UUID into your database seed or API test.
- Use bulk output for fixture files, clearing the list before the next test run.
Practical tips
- Use bulk mode to seed test fixtures or database rows with unique keys quickly.
- Version-4 UUIDs are random, not sortable—use a time-based ID if you need ordering.
- Never reuse a UUID as a secret; they are unique but not unguessable in the security sense.
Example
Mint 5 UUIDs for test database rows in a local seed script.
Related tools on Webtoolshop
- Password Generator — Secrets for accounts—not database IDs.
- Hash Generator — Checksums of known strings, not random IDs.
Limitations
v4 random UUIDs. Bulk mode is capped so the page stays usable. Not sequential IDs.
Privacy & data
We do not run a database on this static site. Text and generated output exist only in your tab until you close or refresh the page.
Frequently asked questions about UUID Generator
What does the UUID Generator not do?
UUID v4 is unique, not secret. Do not use as API keys or session tokens.
Give me a concrete example for the UUID Generator.
Mint 5 UUIDs for test database rows in a local seed script.
Why did the UUID Generator fail or look wrong?
Try a smaller file, fewer pasted characters, or an updated browser. Extensions that block scripts or downloads sometimes interfere—test in a private window if results never appear.
Does Webtoolshop store text I paste into the UUID Generator?
We do not run a database on this static site. Text and generated output exist only in your tab until you close or refresh the page.
UUID Generator
Version 4 UUIDs (random) — single or bulk.