# UUID generator — bulk & secure, no upload

> Generate UUIDs (v4 and others) in bulk with Web Crypto, in your browser. Nothing is uploaded — identifiers are created on your device.

Generate UUIDs — v4 random and other versions — individually or in bulk, using the browser's secure random source. Nothing is transmitted; the UUIDs are created on your device.

UUIDs are the default unique identifier for records, events, and keys. Generating them locally from a secure source means you can produce a batch for seeding or testing without any external service.

For sortable or compact alternatives use the ULID/NanoID generator, and for a data column of IDs, the Data Zone ID generator.

## How to

1. **Pick a version.** Choose the UUID version you need.
2. **Set the count.** Generate one or a batch.
3. **Copy.** Copy the UUIDs into your code or database.

## FAQ

### Is UUID v4 random enough for keys?

Yes. v4 UUIDs draw 122 bits of randomness from Web Crypto here, making collisions effectively impossible at normal scale.

### Should I use UUID or ULID?

UUID v4 is the universal standard; ULID adds time-ordering for better database locality. Use the ULID/NanoID tool if you need sortable IDs.

### Is anything uploaded?

No. UUIDs are generated in the browser, so nothing leaves the tab.


## Related tools

- [ULID / NanoID](https://www.safepaper.app/dev/id-gen)
- [ID generator](https://www.safepaper.app/data/generate-ids)
- [Password generator](https://www.safepaper.app/dev/password-gen)
- [Base32 / Base64URL](https://www.safepaper.app/dev/base32)

---

Canonical HTML: https://www.safepaper.app/dev/uuid
Markdown: https://www.safepaper.app/dev/uuid.md

There is no upload endpoint — your files are processed in this browser tab. Open your network tab and check.