Need safe unique-looking IDs for fixtures, migration samples or request correlation without a server round trip?
Never paste production passwords, live JWT access tokens or private customer records.
No uploads, cookies, tracking or third-party scripts. Your input stays in browser memory.
Ready. Enter a test value.
Hand-written test identifiers can accidentally collide or use an invalid format. A real UUID v4 uses random bytes and carries a recognizable version/variant structure; this generator uses the browser's cryptographic random source.
Choose a count from 1 to 100, click Generate and copy the result. Each button press creates new UUID v4 strings locally, suitable for non-secret fixture identifiers and request correlation.
UUIDs are identifiers, not passwords or authentication tokens. Collision risk is low but not mathematically impossible. An application must still enforce uniqueness at its own storage boundary.
No finite random generator guarantees uniqueness. UUID v4 collisions are extraordinarily unlikely at ordinary scale, but databases should enforce unique constraints.
No. Do not use plain UUIDs as passwords, bearer tokens or encryption keys.
No. They are created in browser memory and shown only in the current tab.