KSUID Generator

What a KSUID is for

A KSUID combines two useful properties in one identifier. First, it includes a timestamp, so newer values sort after older ones. Second, it includes a 16-byte random payload, so two records created at the same time still have a very large uniqueness space. This gives developers a practical online calculation tool for generating sortable IDs without exposing sequential database counters.

That is why KSUIDs appear in systems that value ordering and decentralised ID generation. If you need a web calculator or browser generator for IDs that can be produced independently and then sorted later, a KSUID generator can be more useful than a purely random identifier that has no embedded time component.

How KSUID structure works

A KSUID is 20 bytes long in binary form. The first 4 bytes store a timestamp offset from the KSUID epoch in March 2014, and the remaining 16 bytes store a random payload. When that 20-byte value is encoded in base62, it becomes a fixed 27-character string that preserves sort order when compared lexically.

Why sortability matters

In many systems, the most useful property is not only uniqueness but time ordering. A KSUID generator produces values that can be sorted as strings and still line up with creation time. That is valuable for feeds, audit trails, append-only logs, and event stores where records are often viewed in chronological order.

This also makes KSUIDs appealing as an all in one calculator-style utility for developers who need a quick identifier tool online. Instead of juggling one random ID tool and a separate timestamp field, you get one compact result that carries both ideas together.

How this KSUID generator helps

This page acts as both a generator and a decoder. You can create one ID or a whole batch, seed generation from a chosen timestamp, sort the generated results, and inspect any existing KSUID to decode the embedded timestamp and payload bytes. That makes it useful as a free online calculator, developer utility, validation tool, and quick browser generator in one place.