UUID Generator
Generate one UUID or a thousand at once, as v4 (random) or v7 (time-sortable). Randomness comes from the operating system through crypto.getRandomValues, not Math.random — a distinction that matters whenever the identifier must not be guessable.
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How it works
v4 is 122 bits of pure randomness. v7 replaces the first 48 bits with a millisecond timestamp, so UUIDs generated in sequence sort in order — which is precisely why it behaves far better as an indexed primary key.
- Random v4 and time-sortable v7 UUIDs
- Bulk generation from 1 to 1000, with copy-all in one click
- Configurable format: uppercase, no hyphens, or brace-wrapped
- Cryptographic randomness via crypto.getRandomValues