Free tool

UUID Generator

Generate UUIDs, ULIDs, and NanoIDs. Bulk generate up to 25 at once and copy with one click.

Type:

UUID v4

Random UUID. Most common, good for general use.

d32af6e1-fd01-43ec-ab35-83e1840246da

1 ID generated

36 characters each

Quick reference

UUID v436 chars, random, most compatible

UUID v736 chars, time-sortable, database-friendly

ULID26 chars, sortable, case-insensitive

NanoID21 chars, URL-safe, compact

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. UUIDs are commonly used in databases, distributed systems, and APIs.

UUID versions

•UUID v4 — Random. Most commonly used, great for general purposes
•UUID v7 — Time-ordered. Sortable by creation time, ideal for database keys

Alternatives

•ULID — 26 characters, case-insensitive, sortable
•NanoID — 21 characters, URL-safe, compact

When to use each type

•UUID v4 — General purpose, maximum compatibility
•UUID v7 — Database primary keys, when time-ordering matters
•ULID — When you need sortability and case-insensitivity
•NanoID — URLs, user-facing IDs, when space is limited

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