UUID Generator

Generate random UUID v4 (GUID) values, one or a thousand at a time.

Runs in your browser. Your text and files never leave your device.

How to generate UUIDs

  1. Choose how many you need, up to 1,000.
  2. Pick a format: uppercase, without hyphens, or wrapped in braces for Microsoft-style GUIDs.
  3. Press Copy all. Each UUID is on its own line.

Need a timestamp too? Convert dates with the epoch converter.

Frequently Asked Questions

What is a UUID?

A UUID (universally unique identifier), also called a GUID, is a 128-bit ID written as 32 hex digits, like 3f2b8c1e-9d4a-4f6b-8e2a-1c5d7b9e0a4f. Systems use them as IDs that won't clash, without a central counter.

Which version does this generate?

Version 4: random UUIDs made with your browser's cryptographically secure random generator (crypto.randomUUID).

Can two UUID v4 values ever be the same?

In theory, yes; in practice, no. There are 2^122 possible values. You would need to generate about a billion per second for 85 years to reach a 50% chance of one duplicate.

Are these UUIDs stored or logged?

No. They are created in your browser and never sent anywhere.

Free tool: JSON FormatterFormat, validate and minify JSON. Errors show the exact line and column.Free tool: Base64 Encode and DecodeEncode text or files to Base64 and decode Base64 back, with full UTF-8 support.Free tool: URL Encode and DecodePercent-encode text for URLs and decode encoded URLs back to readable text.Free tool: Epoch ConverterConvert Unix timestamps to dates and dates to Unix time, in seconds or milliseconds.