Tool Factory

UUID Generator

Generate UUID v4 and UUID v7 locally — the same page works as an online GUID generator.

  • UUID v4
  • UUID v7
Version

Choose UUID v4 or v7, set a count, then generate. This online GUID generator uses Web Crypto in your browser.

This UUID generator creates RFC 9562 identifiers in your browser. Use UUID v4 when you want a random id, or UUID v7 when you want time-ordered values that still look like standard UUIDs. The same output works as an online GUID generator whenever a form or API asks for a GUID.

v4 fills 122 random bits and sets the version and variant nibbles. v7 writes a 48-bit Unix timestamp in milliseconds, then random data, so newer IDs tend to sort after older ones. Both paths call Web Crypto (`crypto.getRandomValues`) — no third-party script, no network.

Bulk generate up to 1,000 IDs, copy a single row, or copy all as a newline-separated list. Nothing is uploaded. For campaign URLs, open the UTM builder. For position math after several buys, use the stock average calculator.

How to use the UUID generator

  1. Choose UUID v4 (random) or UUID v7 (time-ordered).
  2. Set how many IDs to create, from 1 to 1,000.
  3. Select Generate. Each row is a unique identifier.
  4. Copy one ID, or copy all for a list you can paste into a file or script.

Frequently asked questions

What is a UUID generator?

A UUID generator creates 128-bit identifiers in the 8-4-4-4-12 hex format. This page is also an online GUID generator: GUID is the same identifier family under a Microsoft name.

What is the difference between UUID v4 and UUID v7?

UUID v4 is random. UUID v7 embeds a Unix timestamp in milliseconds so IDs sort roughly by time, which helps database indexes. Both use Web Crypto for the random bits.

Can this online GUID generator create many IDs at once?

Yes. Set How many (up to 1,000), generate, then copy one row or copy all. Bulk generation stays in the browser.

Are generated UUIDs sent to a server?

No. IDs are created with the Web Crypto API in your browser. We do not log, store, or upload them.

Is a UUID the same as a GUID?

For practical use, yes. A GUID is Microsoft’s name for the same 128-bit value. You can treat this UUID generator as an online GUID generator when a form asks for a GUID.

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