Generate cryptographically random UUID v4 identifiers or time-sortable ULIDs in bulk. Click any result to copy it.
Use UUID v4 when you need an opaque, unpredictable identifier (session tokens, user IDs, public IDs). Use ULID when you'd benefit from time ordering — for example, primary keys where newer rows clustering together helps index performance, or distributed event IDs you want to sort chronologically without a separate timestamp column.
Yes. All randomness comes from crypto.getRandomValues, which the browser backs with a cryptographically secure RNG. UUID v4 in particular has 122 bits of entropy, well above the 128-bit ceiling that's considered safe against brute force.
No. Generation, copy, and download all happen locally in your browser. No analytics event records the IDs and nothing is sent to a server — the tool works fully offline after the page loads.