UUID & API Key Generator
Generate v4 UUIDs or random API keys in bulk, securely in your browser.
About this tool
A version-4 UUID is a 122-bit random identifier that's effectively unique without any central coordination — ideal for database keys, request IDs and idempotency tokens. Random API keys serve a similar role as opaque secrets.
Generate UUIDs or random keys in batches, with adjustable length and character set for keys. Everything uses the browser's cryptographically secure random generator and runs locally, so generated values are never seen by any server.
Frequently asked questions
Not literally guaranteed, but the odds of a v4 UUID collision are so vanishingly small that they're treated as unique in practice.
Yes — they're produced with cryptographically secure randomness. As with any secret, store it safely and never commit it to source control.
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