Check a UUID Version
Find out whether a UUID is v1, v4, v7, or another version at a glance.
💡 Versions 1, 6, and 7 (and ULIDs) embed a creation time, which is decoded above. Versions 4 are fully random and carry no timestamp. Everything is parsed in your browser.
UUID versions tips
The version is encoded in the 13th hex digit. This tool reads it and names the format for you.
v4 is random (no metadata); v1/v6/v7 are time-based; v3/v5 are name-based hashes.
It also decodes the variant bits to confirm it's a standard RFC 4122/9562 UUID.
Parsing is local — paste production identifiers without sending them anywhere.
工作原理
为什么选择我们的？
Also check out…
Extract the Timestamp from a UUIDv7
Decode the creation time embedded in a sortable UU
Decode a ULID
Read the timestamp and randomness from a ULID.
Debug IDs in Logs and Databases
Quickly understand an unfamiliar identifier you fo
Learn How UUIDs Are Structured
See the version, variant, and time fields that mak