Generate UUID v1 identifiers with a privacy-safe randomized node, inspect timestamps and clock sequence values, analyze node exposure and export UUID v1 results directly in your browser.
UUID v1 is a time-based UUID format. It stores a 60-bit timestamp, a clock sequence and a 48-bit node identifier inside a 128-bit UUID.
The timestamp uses 100-nanosecond intervals from the UUID Gregorianepoch of October 15, 1582. This makes it possible to recoverapproximate creation time directly from the identifier.
Unlike UUID v4, UUID v1 is not purely random. Its timestamp is partof the UUID structure. Anyone who has the UUID can decode thattimestamp if they know the UUID v1 format.
Traditional UUID v1 implementations can use a machine's MAC addressas the node identifier. This can expose information about thegenerating system.
This generator intentionally uses a randomized node identifier withthe multicast bit set. Your hardware MAC address is therefore notinserted into the generated UUID.
UUID v1 is an older time-based design. UUID v6 rearranges thetimestamp fields to improve lexical ordering, while UUID v7 usesUnix milliseconds and random data and is designed for moderntime-ordered identifiers.
UUID v1 is a time-based UUID format that contains a 60-bit timestamp, a clock sequence and a 48-bit node identifier.
UUID v1 uses a 60-bit timestamp representing 100-nanosecond intervals since October 15, 1582, the UUID Gregorian epoch.
Traditional UUID v1 implementations can use a MAC address as the node identifier. This generator uses a randomized node identifier with the multicast bit set, so it does not expose your hardware MAC address.
Yes. The timestamp is embedded in the UUID and can be decoded into a human-readable date and time.
The clock sequence helps avoid duplicate identifiers when the system clock moves backward or when the node identifier changes.
UUID v1 contains time information, but its timestamp fields are arranged in the traditional UUID layout rather than in a directly lexicographically sortable order. UUID v6 and UUID v7 are better choices when natural string sorting is important.
UUID v1 always exposes its embedded timestamp. Traditional implementations may also expose a MAC address. This generator uses a randomized node identifier to avoid exposing a hardware MAC address.
Yes. You can generate a batch of UUID v1 identifiers and inspect their timestamp ordering and node information.
UUID v1 can be useful for compatibility with existing systems. For new applications requiring time ordering, UUID v7 is generally a more modern choice because it combines a Unix millisecond timestamp with random data.