Cryptographically-random UUID v4, NIL UUIDs & sortable ULIDs — generated on your device with the Web Crypto API, never sent anywhere.
🔒 Generated locally with crypto.getRandomValues — nothing leaves your browser.
UUID Generator is a free, private text & code tool that runs entirely in your web browser. Generate v4 UUIDs and ULIDs in bulk. Because everything happens locally on your device, your files and data are never uploaded to a server, there is no sign-up or installation required, and it keeps working offline. It is handy for uuid, guid, ulid, random id. Like every HeroTool by Digital Heroes, UUID Generator is 100% free with no limits.
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. HeroTools 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.
Generate v4 UUIDs and ULIDs in bulk.