UUID Generator
Generate one or many random version-4 UUIDs (GUIDs) instantly, in your browser.
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About UUID Generator
UUID Generator creates universally unique identifiers in bulk: version 4 (fully random) or version 7 (time-ordered). Use them as database keys, request IDs, file names or test data.
Version 7 UUIDs start with a timestamp, so they sort in creation order — which keeps database indexes efficient. Both use your browser's cryptographically secure random number generator. It runs entirely in your browser, so nothing you paste is uploaded.
How to use UUID Generator
- Choose v4 (random) or v7 (time-ordered) and how many you need.
- Press Generate.
- Copy one UUID or all of them.
Key features
- UUID v4 and v7
- Generate many at once
- Cryptographically secure randomness
- Copy all with one click
When to use UUID Generator
- Creating primary keys for database records.
- Generating request or correlation IDs for logs.
- Filling test data with unique identifiers.
Tips and common problems
- Choose v7 for database keys — new IDs sort after older ones and keep indexes efficient.
- Choose v4 when the ID should not reveal when it was created.
- Store UUIDs in a native UUID column type where your database has one.
Frequently asked questions
v7 for database primary keys (sortable, index-friendly). v4 when the ID should reveal nothing about when it was created.
In theory yes, in practice no — v4 has 122 random bits, so a collision is astronomically unlikely.
Yes. GUID is Microsoft's name for the same 128-bit identifier.