UUID Generator
Generate UUID version 4 (UUIDv4) strings instantly in your browser.
Each generated UUID is displayed immediately and can be copied with a single click.
The tool keeps a short local history of generated UUIDs, allowing you to review and reuse recent values without regenerating them.
Up to 20 entries are stored for convenience, and the history can be cleared at any time.
This generator is useful for creating temporary identifiers, testing APIs, preparing sample data, or local development tasks.
All UUID generation and history storage are handled locally in your browser.
No generated values are sent to any server, ensuring fast and privacy-safe usage.
How to use & features
- Enter the number of UUIDs you want and click Generate to see the list.
- Use the copy icon on each row or the bulk copy button to send them to the clipboard.
- Generating a large batch may take a few seconds—please wait until it finishes.
- All generation happens locally and nothing is stored after you leave the page.
Sample input & output
Generate UUID v4 values
Input
Generate 2 UUID v4 values
Output
c4f8c3f6-5f2b-4a1a-a4a8-03d52f1bb2f7 1f9a0a33-8dd9-4c4f-9c42-c8b9d4e21d45
Frequently asked questions
Which UUID version is generated?
Can I generate many at once?
Could the same value appear twice?
Common use cases
Numbering test data
Generate batches of UUIDs to populate fixtures or mocks with collision-free identifiers.
Verifying identifier formats
Toggle dashed and undashed forms to ensure values match what your systems expect.
Checking for malformed IDs
Paste existing identifiers to confirm their validity and spot accidental truncation.
Notes & limitations
Work stays in your browser
Inputs and outputs remain local. Closing the tab or clearing cache will remove any temporary state.
Validate critical data
Results are helper outputs—double-check them before sending to production systems or sharing externally.
Large payloads depend on your device
Very large text or files can feel slow in some browsers. Use a desktop environment for heavy workloads.