Free UUID Generator – Bulk Random v4 UUIDs Online

Generate cryptographically random version 4 UUIDs one at a time or in bulk, right in your browser.

How to generate UUIDs

  1. 1

    Set how many you need

    Enter a count from 1 to 100 in the "How many?" field.

  2. 2

    Click "Generate"

    Fresh version-4 UUIDs are created instantly using your browser's secure random number generator.

  3. 3

    Copy the list

    Click "Copy all" to grab every generated UUID, one per line, ready to paste into code, a database, or a spreadsheet.

Example use cases

1

Database primary keys

Generate unique identifiers for rows in a database that don't need a central auto-increment counter.

2

API request IDs

Tag outgoing requests with a unique ID for tracing and debugging across distributed services.

3

Session or token values

Create unpredictable, collision-resistant values for session identifiers or one-time tokens.

4

Test data & fixtures

Bulk-generate placeholder IDs for seeding a development or staging database.

Frequently asked questions

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit value, usually written as 32 hex digits in five groups, designed to be unique across systems without needing a central registry.

What is a v4 UUID specifically?

A version 4 UUID is generated from random or pseudo-random numbers. It's the most common type used for database primary keys, session tokens, and general-purpose unique IDs.

How random and unique are these?

UUIDs here are generated with your browser's crypto.randomUUID(), a cryptographically secure random source. The chance of two generated UUIDs colliding is astronomically small.

Are the UUIDs sent to a server?

No. They're generated entirely in your browser — nothing is transmitted or logged.