Crypto & Hash

UUID Generator

Suggest an improvement

Generate one or many UUIDs at once. UUID v4 is the de facto random identifier; UUID v7 (RFC 9562) is time-ordered, perfect for database primary keys because it sorts naturally.

  • e0c15406-ce80-4721-8c44-80ddb3322088
runtime

Browser-local execution

Inputs stay inside the current tab unless you copy, download or explicitly export.

memory

Session handoff

Magic Paste can pass input to a target tool through sessionStorage, never through the URL.

control

User-owned state

Favorites, recent tools and workflow history are local browser data you can clear from the browser.

smart handoff graph

Suggested next moves

session handoff ready
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Compute SHA-1, SHA-256, SHA-384 and SHA-512 hashes in browser.
01

How to use

  1. 01Pick the version: v4 for random, v7 for time-ordered.
  2. 02Choose how many UUIDs to generate.
  3. 03Copy a single value or download all as a text file.
02

FAQ

Should I use v4 or v7?
Use v7 when the UUID is a database key — its time-ordering avoids index fragmentation. Use v4 for tokens or where unpredictability matters most.
Are these UUIDs cryptographically secure?
Yes. They are generated with crypto.getRandomValues, the secure random source built into your browser.
03

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