BuildId Service

BuildId

BuildId is a tiny HTTP service for lexicographically sortable IDs.

Do you have multiple build servers and want unique, sortable, easy-to-read IDs across all instances?
Then this BuildId service is for you.
Use it for build numbers, release tags, and document workflows.
Additionally, there are utilities to generate lexicographically sortable prefixes for numbers.

https://buildid.dev/api/v1/id -> sortable BuildId

Example: 2HP18K
https://buildid.dev/api/v1/id/unpack?value={BUILDID} -> decode BuildId date and time

Example: 2HP18K -> 2026-02-17T13:23:45Z.

Yes, BuildId keeps the state for you!
https://buildid.dev/api/prefix/{NUM} -> decimal format with a letter

Example: 23 -> B23.
https://buildid.dev/api/pack/{NUM} -> base36 format with a letter

Example: 123 -> B3F.
All examples support an optional delimiter; prefix and pack also support an optional padding argument.

Read API docs for all examples