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UUID Generator

Generate random UUID v4 strings for API tests, databases, and scripts. Instant copy.

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What is a UUID generator used for?

Developers and testers use a UUID generator when they need unique IDs without coordinating a central database sequence. UUID v4 values are random and work well for API keys, test records, and temporary resource names.

UUID generator vs email API workflows

If you are building signup flows or automated testing, you often need both unique IDs and unique inboxes. Combine this tool with the Gamers Mail email API to create disposable or long-term addresses on demand for integration tests.

High-traffic developer searches

Common queries include uuid generator, generate uuid online, random uuid v4, and guid generator. This page gives you RFC-style output you can paste into JSON, SQL, or config files immediately.

More free tools from Gamers Mail

Browse our tools hub for a password generator, email validator, and 2FA authenticator.

Frequently asked questions

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit ID shown as 36 characters like 550e8400-e29b-41d4-a716-446655440000. UUID v4 values are random and extremely unlikely to collide.

When do developers use UUID generators?

For API testing, database primary keys, session tokens, file names, and any place you need a unique string without a central counter.

Is this the same as a GUID?

Yes. GUID (Globally Unique Identifier) is Microsoft's name for the same concept. This tool generates standard UUID v4 format.

Can I generate UUIDs via API?

This page runs in the browser. For automated email and inbox workflows, use the Gamers Mail API documented at gamersmail.com/docs.

Building signup automation?

Use our email API to create inboxes programmatically alongside your UUIDs.

Explore Email API