UUID Generator

Generate universally unique identifiers (UUIDs) in bulk using your browser’s secure random generator.

FreeNo sign-upRuns in your browserMobile-friendly

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What does the UUID Generator do?

A UUID is a 128-bit identifier written as 36 characters, such as 3f2b8c1e-9d4a-4f6b-8a2e-1c5d7e9f0a3b. Version 4 UUIDs are fully random (122 random bits), so collisions are practically impossible. Version 7 UUIDs (RFC 9562) start with a millisecond timestamp, so they sort by creation time — better for database primary keys because they keep indexes compact.

All UUIDs are generated with crypto.getRandomValues().

How to use the UUID Generator

  1. Choose how many UUIDs you need.
  2. Choose version 4 or version 7.
  3. Pick a format.
  4. Copy or download the list.

Examples

Database seed data

Generate 500 v7 UUIDs as primary keys for test records.

Common use cases

  • Database primary keys
  • API request and correlation IDs
  • File and object names
  • Test data

Features and benefits

  • Private by design — your data is processed on your device and never uploaded.
  • Free with no account, no watermark and no usage limits.
  • Works on phones, tablets and desktops in any modern browser.

Limitations to know

  • UUIDs are unique, not secret — do not use them as passwords or access tokens.

Frequently asked questions

Can two UUIDs be the same?

With v4, the chance is so small it can be ignored in practice.

v4 or v7?

v7 for database keys (time-sortable), v4 when you do not want creation time visible.

Is a GUID the same as a UUID?

Yes, GUID is Microsoft’s name for the same format.

Embed this tool on your website

Add the free UUID Generator to your blog or website. Paste the code into your page’s HTML; the tool runs in your visitors’ browsers and stays up to date automatically. Please keep the credit line below the tool.

Free to use on any website. The tool runs inside an iframe served from viptools.pk; nothing your visitors type is sent to your site or ours. Preview the embedded version.

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