UUIDTools.com

Timestamp-First UUID Generator

Laravel's ordered UUID ("COMB"): a v4 with a timestamp prefix.

Decode
Options & format

Formatting is applied instantly in your browser. A GUID is a UUID: tick Uppercase + Braces for the Microsoft registry style.

API
http://uuidtools.com/api/generate/timestamp-first

Plain-text and JSON API docs: no key required.

About Timestamp-first UUIDs

A timestamp-first UUID (also called an ordered UUID or COMB) places a timestamp at the front of an otherwise random UUID, so values sort in creation order. This is the format produced by Laravel's Str::orderedUuid().

The same goal is now met by the standard version 7 UUID, which is the recommended choice for new projects.

When to use it

  • Matching an existing Laravel/Eloquent ordered UUID column.

When to avoid it

  • New projects: use UUID v7, which is standardised and widely supported.