Developer

ULID Generator & Decoder

Create sortable ULIDs or read the timestamp inside one.

Developer

Local only

ULIDs

ModeHow many (generate)

Everything stays in your browser

Your text is processed on your device — nothing is uploaded to a server.

How it works

A ULID is 48 bits of millisecond time + 80 random bits in Crockford Base32, so IDs sort by creation time.

Good to know

How do I use it?

Enter your ulids, adjust the options and press “Run”. Check the result, then copy or download it.

How does it work?

A ULID is 48 bits of millisecond time + 80 random bits in Crockford Base32, so IDs sort by creation time.

Is my data uploaded?

No. Everything is processed in your browser and nothing is sent to a server. No account is needed.