How to use this tool
- Pick how many UUIDs you want (1 to 100).
- Click Generate.
- Copy an individual UUID, or use "Copy all" to grab the whole batch, one per line.
Why generate UUIDs in the browser?
This uses crypto.randomUUID(), a browser-native function backed by a cryptographically secure random number generator — the same quality of randomness a server-side UUID library would use, with no round trip needed.
Frequently asked questions
- What version of UUID does this generate?
- Version 4 — randomly generated, not derived from your device, MAC address, or the current time, which is what "v4" specifically means among the UUID versions.
- Are these safe to use as database primary keys?
- Yes, that's a common use — v4 UUIDs are generated using the browser's cryptographically secure random number generator (crypto.randomUUID), so collisions are astronomically unlikely.
- How many can I generate at once?
- Up to 100 per click — generate again for more.
How GetByteRush compares
Most free tools for this online work the same way: you upload your file to their server, wait, then download the result — which means your file (and often your email, for a "free" account) sits on someone else's infrastructure. Here's the actual difference:
| Feature | GetByteRush | Typical online UUID generators |
|---|---|---|
| Randomness source | Cryptographically secure (Web Crypto API) | Varies by site |
| Batch generation | Up to 100 at once | Often limited or one-at-a-time |
| Account required | Never | Sometimes, for larger batches |
("Typical online tools" reflects publicly documented behavior of common free file-processing sites as of 2026 — always check a specific competitor's own privacy policy and pricing page, since these details change.)