UUID Generator
Generate random UUIDs (v4) instantly. Perfect for database keys, API tokens, and unique identifiers.
About This Free Online UUID Generator
Our free UUID generator creates version 4 universally unique identifiers, the random 128-bit values developers use as primary keys, record IDs, API tokens, and file names. Each UUID is generated locally using your browser's secure random number source and follows the standard RFC 4122 format, with the familiar 8-4-4-4-12 hyphenated layout. You can produce a single identifier or generate many at once for seeding a database or building test fixtures, then copy the whole batch with one click. Because version 4 UUIDs are random, the chance of two ever colliding is vanishingly small, which makes them ideal for distributed systems where you cannot rely on a central counter. Nothing is sent to a server, so the identifiers you create are yours alone. There is no signup and no limit on how many you generate.
Features of Our UUID Generator
- Generate UUID v4 (random) identifiers
- Generate 1 to 100 UUIDs at once
- Copy all UUIDs to clipboard
- Download UUIDs as a text file
- 100% private — browser-only generation
How to Use the UUID Generator
The UUID Generator works right in your browser — no signup, no installation. Follow these steps:
- Set how many UUIDs you want to generate (1-100).
- Click Generate to create the UUIDs.
- Click Copy to copy all UUIDs or Download to save as a file.
Frequently Asked Questions About UUID Generator
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier formatted as 8-4-4-4-12 hexadecimal digits, e.g., 550e8400-e29b-41d4-a716-446655440000. UUID v4 uses random numbers and has 2^122 possible values.
Are UUID v4 truly unique?
UUID v4 has approximately 5.3 × 10^36 possible values. The probability of generating a duplicate is astronomically small — you would need to generate billions of UUIDs per second for centuries to have a meaningful chance of collision.
Why Choose the UUID Generator?
The UUID Generator produces exactly what you need on demand, with options that put you in control of the output. Generation happens in your browser, so it is instant, repeatable, and completely private — nothing is uploaded.