Developer Utilities
UUID generator, cron expression parser, and HTTP status code lookup — instantly in your browser.
Generate random UUIDs, translate a cron expression into plain English, or look up what an HTTP status code means — quick reference tools for everyday development work, with nothing to install.
How to use this tool
- 1Enter how many UUIDs you want (1–50) in the "How many" field.
- 2Click "Generate" to create that many random v4 UUIDs.
- 3Click "Copy" next to any single UUID to copy just that one, or "Copy All" to copy the whole list at once.
Frequently asked questions
What version of UUID does this generate?
Version 4 (random) UUIDs, generated with the browser's built-in crypto.randomUUID() — the same cryptographically secure random source used for things like session tokens.
Can two generated UUIDs ever collide?
It's astronomically unlikely. A v4 UUID has 122 random bits, so even generating billions of UUIDs per second, the chance of a duplicate is effectively zero for practical purposes.
Are the UUIDs I generate sent anywhere?
No — they're generated entirely in your browser using the Web Crypto API and never leave your device or touch a server.
Is there a limit to how many I can generate?
The input caps at 50 per click to keep the list readable, but you can click Generate as many times as you like.