About this UUID v7 generator
UUID version 7 (RFC 9562) embeds a Unix millisecond timestamp in the first 48 bits, so IDs sort by creation time. That makes them a great database primary key because inserts stay index-friendly, unlike random UUID v4.
How to use the UUID v7 Generator
- Choose how many UUIDs to generate.
- Click Generate and copy the list.
- Paste an existing UUIDv7 to decode its timestamp.
Frequently asked questions
UUID v4 vs v7: which should I use?
Use v7 when IDs are database keys or need to sort by time; use v4 when you want no embedded information at all.
Is UUID v7 unique?
Yes. Besides the timestamp it contains 74 random bits, so collisions are practically impossible.
Is my data safe?
Yes. The tool runs entirely in your browser using WebAssembly. Nothing you type or upload is sent to a server, logged or stored.
Is it free?
Yes, completely free with no sign-up, no limits and no watermarks. It also works offline once the page has loaded.