Random UUID Generator
Generate random UUIDs (GUIDs) in the standard 8-4-4-4-12 format — ready to copy for keys, test data and unique identifiers.
Updated June 2026
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This UUID generator produces universally unique identifiers in the canonical 36-character form (8-4-4-4-12 hex digits) defined by RFC 4122. UUIDs are designed so that the chance of two ever colliding is negligible, which makes them the standard choice for database primary keys, correlation IDs, and any identifier that must be unique without a central authority.
Developers use generated UUIDs to seed test rows, build sample API payloads, and stand in for real IDs in documentation. Because they are random, each one is distinct, so they are ideal for testing uniqueness constraints and key handling.
Choose how many you need and press Generate — free, unlimited, and instant, with copy-one and copy-all. Each value is a fresh random identifier that points to nothing until you assign it.
UUID format (RFC 4122)
| Group | Length | Example |
|---|---|---|
| Group 1 | 8 hex | f47ac10b |
| Group 2 | 4 hex | 58cc |
| Group 3 | 4 hex | 4372 |
| Group 4 | 4 hex | a567 |
| Group 5 | 12 hex | 0e02b2c3d479 |
The canonical UUID string is 32 hexadecimal digits in five groups separated by hyphens.
Frequently asked questions
What is a UUID?+
A UUID (universally unique identifier), also called a GUID, is a 128-bit value written as 32 hexadecimal digits in an 8-4-4-4-12 pattern. It is used as a unique key without needing a central registry.
Are generated UUIDs unique?+
Each generated UUID is random, so collisions are astronomically unlikely. For practical purposes you can treat every generated value as unique.
Can I generate many UUIDs at once?+
Yes. Pick a count (up to 50) and use Copy all to grab the whole batch.
Is the UUID generator free?+
Yes — free and unlimited, no sign-up.