Use a browser-based UUID generator to create a random version-4 UUID, a 128-bit identifier you can use as an API key or record id. It is generated with cryptographic randomness on your device and never sent to a server.
A version-4 UUID is 128 bits of mostly random data, which makes accidental collisions vanishingly unlikely and makes the value hard to guess. That combination is why UUIDs are commonly used as opaque identifiers and simple API keys. A generator that uses the browser cryptographically secure random source produces values suitable for that purpose.
Because the UUID is created locally, the identifier is never transmitted while you generate it, so you control where it goes. You can produce a single UUID or a batch at once and copy them with a click. It is free and needs no sign-up.
A v4 UUID is mostly random 128-bit data generated with secure randomness, so it is hard to guess.
No. It is generated in your browser and never transmitted.
Yes. You can create a single UUID or a batch in one step.