48-bit Unix milliseconds

Generate time-ordered UUIDv7 values with visible timestamp evidence

The first 48 bits contain one explicit batch timestamp; the remaining 74 data bits are freshly randomized.

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.