UUID Generator | How to use and interpret results
Generate UUID v4 values from browser cryptographic randomness with uppercase and hyphen display options. A fallback can set version and variant bits on random bytes when randomUUID is absent.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
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How to use this tool
Choose a count from 1 through 100 and the formatting options. Keep standard hyphens when the receiving system requires the conventional representation.
Results and examples
A count of five produces five ID lines. Removing hyphens changes notation; it does not add generation time or a sequential number to the UUID.
Worked example
A count of five produces five ID lines. Removing hyphens changes notation; it does not add generation time or a sequential number to the UUID.
Limitations
- No repository-wide duplicate lookup is performed.
- UUIDs do not replace access control, secret storage or sequential ordering.
Fields
| Field | Guidance and constraints |
|---|---|
| Count | Check the unit and format displayed beside this field. |
| Uppercase | Check the unit and format displayed beside this field. |
| Include hyphens | Check the unit and format displayed beside this field. |
| Result (UUIDv4) | Check the unit and format displayed beside this field. |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
Does removing hyphens create a different ID type?
A count of five produces five ID lines. Removing hyphens changes notation; it does not add generation time or a sequential number to the UUID.
Can the result be sorted as a sequence number?
No repository-wide duplicate lookup is performed. UUIDs do not replace access control, secret storage or sequential ordering.
