UUID Generator
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About this tool
UUID Generator supports v4 (random) and v7 (time-based, sortable). Uses cryptographically secure random numbers. Supports batch generation, uppercase and no-dash formats.
Common uses: database primary keys, distributed system IDs, session tokens.
Frequently asked questions
Which UUID version should I use?
v4 (random) is the most common choice for unique IDs. Use v1 only when you need time-ordered identifiers.
Are these UUIDs guaranteed to be unique?
v4 UUIDs have 122 random bits, making collisions astronomically unlikely for practical purposes.
Can I generate many at once?
Yes, set the count and copy them all together — generation runs entirely in your browser.