UUID Generator

UUIDs are 128-bit identifiers used as database keys, request IDs, and more. This tool generates them with cryptographically strong randomness, entirely in your browser.

Which version should I use?

• v4 — Random. The default. 122 random bits; collision-proof for practical purposes.
• v7 — Time-ordered. A millisecond timestamp in the high bits, so v7 UUIDs sort by creation time — ideal as a modern primary key with good index locality.
• v1 — Timestamp + node. Classic time-based UUID combining a 100-nanosecond timestamp, clock sequence, and a node id.

Formatting

Toggle uppercase, no hyphens, or wrap in braces to match whatever your code, database, or config expects. Use the count field to generate up to 500 at once and Copy all.