Before building ULID Generator, we looked at how three existing ULID generator sites handle bulk generation, timestamp decoding, and UUID conversion.
Bulk generation shouldn't be a separate page
One of the sites we checked shows a single ULID on its main page, with bulk generation tucked behind a separate "/bulk" link. If you're seeding test data or need a batch of IDs for a migration script, that's an extra page load just to get there. This tool puts the count field (1 to 1000) right on the main screen — no navigating away.
What good is a ULID if you can't check its timestamp?
A ULID's whole appeal for a database primary key is that its first 48 bits are a real millisecond timestamp — that's what makes it sortable. But most of the sites we looked at either don't expose that timestamp at all, or split it into a separate "decode" page you have to visit after the fact. This tool shows the embedded timestamp next to every ULID the moment it's generated, so you never lose the "when was this created" context in the first place.
Migrating from UUID shouldn't need a different tool
If you're moving an existing UUID-keyed table to ULID (or just want to compare the two formats), one site we checked had no UUID conversion at all, and the one that did put it on a different page from the generator. This tool has ULID→UUID and UUID→ULID conversion boxes side by side on the same screen as generation — paste either format in and get the other back, with no value loss in either direction.
