Developer & Text · UUID Generator
Generate UUIDs, ULIDs and NanoIDs on your computer
Quick answer
Open Toolfox → UUID Generator to get UUID v4 (random), UUID v7 (time-ordered), ULIDs or NanoIDs, up to 1,000 at a time, updated as you change options. Switch to “Inspect pasted IDs” to see an ID's version and timestamp. It runs entirely on your computer (Mac, Windows or Linux). Files are never uploaded.
How to do it
- Open UUID Generator.
- Choose the type and how many (5 by default).
- Adjust the format: uppercase, hyphens or { } braces for UUIDs, or length and alphabet for NanoID.
- Copy the IDs, or click New batch for fresh ones.
Options you can set
- Action
- Type
- How many
- Uppercase
- Hyphens
- Wrap in braces { }
- Length
- Alphabet
Good to know
- Random parts come from your operating system's secure random number generator. IDs in one batch are always distinct.
- UUID v7 and ULID embed the creation time to the millisecond. Use UUID v4 or NanoID when that shouldn't be visible.
- Inspect accepts one ID per line: UUIDs with or without hyphens, braces or urn:uuid:, and ULIDs.
UUID Generator FAQ
Should I use UUID v4 or v7?
v7 and ULID sort by creation time, which suits database keys, but they reveal when they were made, to the millisecond. Use v4 or NanoID when that shouldn't be visible.
Can I check which version a UUID is?
Yes. Choose “Inspect pasted IDs” and paste one per line: UUIDs with or without hyphens, braces or urn:uuid:, and ULIDs.
Are the IDs unique?
IDs in one batch are always distinct, and their random parts come from your operating system's secure random number generator.
Is UUID Generator in Toolfox free?
Yes. UUID Generator is one of 57 tools in Toolfox, a free app for Mac, Windows and Linux with no account, ads, limits or watermarks.
Does UUID Generator upload my files?
No. Toolfox processes files on your own computer and works offline; your files are never uploaded.
More developer & text tools in Toolfox
Get UUID Generator and 19 more tools.
Free forever. No account. Works offline. For macOS, Windows and Linux.
Updated 2026-10-18 · Toolfox v0.2.1