What can a UUID decoder tell me?

A UUID decoder can validate the UUID format, show the UUID version and variant, split the 128-bit value into fields, and decode embedded timestamps for UUID versions that include time data.

Can every UUID be decoded into a timestamp?

No. UUID v1, v6, and v7 include timestamp data. UUID v4 is random, and UUID v3 and v5 are name-based hashes, so they do not reveal a creation time.

Is this UUID decoder private?

The decoder runs locally in the browser. The UUID you enter is parsed on the page and does not need to be sent to a server.

UUID decoder

Decode a UUID

Paste a UUID to inspect its version, variant, canonical format, byte layout, and timestamp details when the UUID contains time data.

UUID decoder tool

UUID to decode

What does UUID decoding show?

A UUID is a 128-bit identifier written as 32 hexadecimal characters in five groups. This decoder validates that shape, normalizes the value, and explains the UUID version and variant bits that identify how the UUID was made.

Decoded fields

Canonical UUID string and raw hexadecimal value.
UUID version, variant, and field groups.
Timestamp for UUID v1, UUID v6, and UUID v7 values.

UUID version decoder

UUID v4

UUID v4 values are random. A decoder can show that the version digit is 4, but there is no timestamp or namespace to recover.

UUID v5

UUID v5 values are deterministic hashes of a namespace and name. The original name cannot be decoded from the UUID.

UUID v7

UUID v7 values start with a Unix epoch millisecond timestamp, so this decoder can show the embedded creation time.

UUID format reference

Part	Characters	What it means
`xxxxxxxx`	8 hex characters	The first 32 bits. For UUID v7, this is the high part of the Unix millisecond timestamp.
`xxxx`	4 hex characters	The next 16 bits. For UUID v7, this completes the 48-bit timestamp.
`Mxxx`	4 hex characters	The first hex digit is the UUID version, such as `4` for UUID v4 or `7` for UUID v7.
`Nxxx`	4 hex characters	The first bits identify the UUID variant. Modern UUIDs normally use the RFC 9562 variant.
`xxxxxxxxxxxx`	12 hex characters	The final 48 bits. The meaning depends on the UUID version.

UUID decoder FAQ

Can I decode who created a UUID?

No. UUIDs do not include a username, application name, or database table. Some versions reveal generation method or time, but not the creator.

Can a UUID decoder validate UUIDs?

Yes. This page accepts hyphenated UUIDs, URN UUIDs, and compact 32-character UUIDs, then reports whether the value has valid hexadecimal bytes.

Does UUID v7 expose time?

Yes. UUID v7 encodes Unix epoch milliseconds in the first 48 bits, which can reveal the approximate creation time.

Other UUID tools

UUID v4Generate random identifiers. UUID v5Generate deterministic namespace IDs. UUID v7Generate timestamp-ordered IDs. Compare UUIDsChoose between UUID versions.