Decode a ULID

Read the timestamp and randomness from a ULID.

Nid oes angen mewngofnodi

UUID or ULID

💡 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.

ULID tips

🆔

A ULID packs a 48-bit millisecond timestamp into its first 10 Crockford base32 characters.

🕒

This tool decodes that timestamp to a date and splits out the 80 random bits.

🔤

ULIDs are case-insensitive and URL-safe — paste in any case.

🔒

Everything is decoded locally in your browser.

Sut Mae'n Gweithio

Ewch i mewn

Enter your data into the tool above. Everything stays local to your browser.

Proses

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Lawrlwythwch

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

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🏷️

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Find out whether a UUID is v1, v4, v7, or another

🕒

Extract the Timestamp from a UUIDv7

Decode the creation time embedded in a sortable UU

🐞

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🎓

Learn How UUIDs Are Structured

See the version, variant, and time fields that mak

Cwestiynau Cyffredin

Back to UUID Inspector