Free alternative to UUIDGenerator.net
Tools Nimbus is a free, no-signup developer toolkit that runs entirely in your browser, so your data is never uploaded to a server. As a free alternative to UUIDGenerator.net, its UUID Generator creates version 4 UUIDs locally with no ads and no server round-trip. UUIDGenerator.net stays the better pick when you need version 1 or 7, a downloadable file, or its HTTP API.
Last updated June 2026
The short version
UUIDGenerator.net is a fast, well-known UUID tool, and it is free with no signup, so this is not a story about price. Pick the Tools Nimbus UUID Generator when you want random version 4 UUIDs on a clean, ad-free page where the value is created in your own browser and never sent across the network. Pick UUIDGenerator.net when you need other UUID versions, a file download, or a scriptable API. Both produce valid, standards-compliant UUIDs; the choice is about variants, delivery, and whether generation stays local.
Feature comparison
The table below compares the free web tools side by side. A check means the capability is present and a dash means it is absent. Pricing is marked as of 2026.
| Capability | Tools Nimbus | UUIDGenerator.net |
|---|---|---|
| Price (as of 2026) | Free, $0 | Free, $0 (ad-supported) |
| Account or signup required | No | No |
| Version 4 (random) UUIDs | Yes | Yes |
| Generated in your browser (no server round-trip) | Yes | No (generated server-side) |
| Bulk generation | Yes (up to 100) | Yes |
| One-click copy | Yes | Yes |
| No third-party ads | Yes | No (ad-supported) |
| Version 1 (timestamp) UUIDs | No | Yes |
| Version 7 (sortable) UUIDs | No | Yes |
| Nil UUID and GUID variants | No | Yes |
| Download a batch to a file | No | Yes |
| HTTP API for scripts | No | Yes |
Where Tools Nimbus is genuinely different
Both tools are free and both generate valid UUIDs, so the honest differences are narrow and worth stating plainly.
- The value is created locally. The Tools Nimbus UUID Generator calls
crypto.randomUUID()in your browser, so no request is made and no UUID is generated on, or logged by, a server. UUIDGenerator.net generates the value server-side and returns it. For most UUIDs this is a non-issue, but if you are minting a value that will become an API key, an invite token, or another shared secret, keeping generation entirely on your own machine is the safer default. - No ads. UUIDGenerator.net funds its free tool with display advertising. The Tools Nimbus page shows no ads, so it stays quiet and loads fast.
- Works offline once loaded. Because generation is local, the tool keeps working in a normal browser tab with no connection after the page has loaded, at no cost and with no upgrade.
Where UUIDGenerator.net is still the better pick
A fair comparison cuts both ways. UUIDGenerator.net does several useful things the Tools Nimbus tool does not, and if you need any of them, it is the right choice:
- Other UUID versions. UUIDGenerator.net produces version 1 (timestamp), version 7 (time-ordered and sortable), nil UUIDs, and Microsoft-style GUIDs. Tools Nimbus produces version 4 only. If you want database keys that sort by creation time, version 7 from UUIDGenerator.net is the better fit.
- Downloads and an API. UUIDGenerator.net can download a batch to a file and exposes an HTTP API you can call from scripts or CI. Tools Nimbus is a copy-to-clipboard tool with no API.
How to generate UUIDs with Tools Nimbus
Open the UUID Generator, set how many you need with the slider (one to one hundred), and press Generate. A fresh batch of version 4 UUIDs appears instantly, and Copy all puts the whole list on your clipboard, one per line. Each value comes from crypto.randomUUID(), the same secure random source your runtime uses, so the output is suitable for primary keys, request IDs, and file names. Nothing is sent anywhere.
Related browser-based tools
UUIDs rarely travel alone. When you need other random values, the Password Generator and Hash Generator also run locally on your browser secure random source and crypto APIs, so secrets and digests never leave your device either. For more side-by-side comparisons of free developer tools, browse the guides index. Everything runs locally, so your data never leaves your device.