UUID Generator
Generate UUID v4, time-ordered UUID v7 and Nano IDs in bulk.
Runs entirely in your browser — nothing is uploaded.
About the UUID Generator
The Freemium.Tools UUID generator creates cryptographically random UUID v4, time-ordered UUID v7 and Nano IDs in bulk, generated locally by your browser.
A UUID is a 128-bit identifier that can be created independently on any machine without a central counter and still be practically guaranteed unique.
Version 4 is fully random and best for general use. Version 7 starts with a timestamp, so identifiers sort chronologically — which keeps database indexes tidy when a UUID is the primary key.
How to use it
- 1Choose the type. UUID v4, time-ordered v7, Nano ID or a short 8-character ID.
- 2Set how many. Generate up to 500 identifiers at once.
- 3Copy or download. Copy them all or save them as a text file.
Frequently asked questions
Are these UUIDs really unique?
They use your browser's cryptographically secure random source. The chance of a v4 collision is so small it is ignored in practice, even across billions of identifiers.
When should I use UUID v7 instead of v4?
Use v7 when the identifier is a database primary key. Because it begins with a timestamp, inserts stay sequential and the index does not fragment the way random v4 keys do.
What is a Nano ID?
A shorter URL-friendly random identifier, 21 characters by default, commonly used for public links and slugs where a full UUID would be unwieldy.
Can I use these in production?
Yes. They are generated with the same secure random API server-side libraries use.
Are the generated IDs stored?
No. They are created in your browser and never sent anywhere.