UUIDLens
Open generator

122 random bits

Generate canonical random UUIDv4 values

Every value receives fresh Web Crypto bytes before the version and RFC variant bits are set.

Runs locally

Generate or validate UUID text

UUIDs stay in this browser

Generate 1–1,000 values per action.

UUIDv4 and UUIDv7 generation only; validation recognizes RFC versions 1–8 plus Nil and Max.

UUIDs are identifiers, not passwords, access tokens, signatures or proof that a record exists.