Cryptographically-random UUID v4, NIL UUIDs and sortable ULIDs. Generated on your device with the Web Crypto API. Nothing is ever sent to a server.
Generated locally with crypto.getRandomValues, nothing leaves your browser.
UUID Generator is a free, private browser tool by Digital Heroes. Generate UUID v4, NIL UUIDs, and sortable ULIDs in bulk, up to 100 at a time. Everything runs locally on your device: your data is never uploaded to a server, there is no sign-up, and no installation is required. The tool works offline once loaded. Format options let you toggle uppercase, hyphens, and brace wrapping. Copy all results at once or download them as a .txt file.
Yes, UUID Generator is completely free for everyone. No sign-up, no account and no usage limits.
No. UUID Generator runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.
Yes. This tool is a Progressive Web App, once the page has loaded it keeps working offline, and you can install it as an app from your browser.
No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.
It generates UUID v4 (random 128-bit identifiers), NIL UUIDs (all-zero placeholders), and ULIDs (sortable 26-character IDs with a 48-bit timestamp prefix). You can generate up to 100 at a time, format the output, and copy or download the results instantly.