UUID Generator

Generate random UUID v4 and GUID values for databases, API fixtures, tests and application records. Everything runs locally in your browser.

Generated UUIDs

Generated UUIDs appear here.

Browser-native crypto

The tool uses crypto.randomUUID when available and falls back to Web Crypto random bytes in older compatible browsers.

UUID and GUID formats

Use lowercase UUIDs for APIs and databases, uppercase GUIDs for Microsoft-style tooling, or hyphenless values when a system requires compact IDs.

Private by default

Generated IDs stay on your device unless you copy and use them somewhere else. No upload endpoint is used.

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Frequently asked questions

What is a UUID?

A UUID is a 128-bit identifier commonly used in databases, APIs, logs and distributed systems. Version 4 UUIDs are random identifiers.

Are UUID and GUID the same thing?

For most practical use, yes. GUID is the Microsoft name for the same 128-bit identifier format that UUID describes.

Does this UUID generator upload anything?

No. UUID generation runs in your browser using browser-native crypto APIs. No generated value is sent to Convertr servers.

Can I generate multiple UUIDs at once?

Yes. Use the quantity field to create up to 100 UUIDs in one click.