UUID Generator
Database rows need unique identifiers that never collide. This tool creates version 4 UUIDs with one click entirely in your browser. Label test values so they never mix with real identifiers.
Step by step
- Decide how many identifiers you need, start with three.
- Click Generate and inspect the format.
- Copy what you need into new records.
- For bulk tests, move values into a spreadsheet.
- Delete test IDs before production data.
Example scenario
Testing an orders table needs a unique key per row. Generate three values and assign them to sample customers. After inserting rows, sorting works correctly. Mark trial keys as test data.
Check your result
Verify 36 characters in 8-4-4-4-12 pattern. Confirm the third group starts with 4. Check the column supports UUID format.
Frequently asked questions
Can a UUID repeat?
Practically no, but keep a unique constraint.
Remove hyphens?
Yes, many systems accept compact form.
Bulk generation safe?
Yes, values are created in the browser.
v1 vs v4?
v4 is fully random, preferred for privacy.
Open the tool: UUID Generator →
Keep an original copy before processing your file. Examples are illustrative; results depend on your document.