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UUID / GUID Generator

Generate random UUID v4 (GUID) identifiers in bulk for database keys and IDs.

Runs in your browser Free
Count
Processed locally in your browser.

What is a UUID?

A UUID (Universally Unique Identifier), known as a GUID in the Microsoft world, is a 128-bit identifier such as '550e8400-e29b-41d4-a716-446655440000'. Version 4 UUIDs are fully random and the chance of two colliding is practically zero.

Use cases

  • Database primary keys
  • API request and transaction IDs
  • File names and temporary identifiers
  • Test data and distributed systems

Bulk and secure

Generate many UUIDs at once and choose upper case or no hyphens. IDs come from the browser's cryptographically secure random source. If you need IDs that sort by time, try the ULID Generator.

How to use UUID / GUID Generator

  1. Choose how many UUIDs to generate.
  2. Set the format options (upper case, no hyphens).
  3. Click "Generate".
  4. Copy or download the UUIDs.

Why use this tool?

Get reliable unique IDs in seconds without writing code or opening a terminal.

FAQ

Are these UUIDs really random?

Yes. The browser's cryptographically secure random source is used.

Is there a difference between UUID and GUID?

In practice they're the same; GUID is Microsoft's name for a UUID.

Can two UUIDs be the same?

Theoretically possible, but so unlikely that it can be ignored in practice.

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