UUID Generator
Generate one or many random UUIDs (v4) with a single click.
v4
UPPERCASE
Click "Generate" to create UUIDs
How it works
Click Generate to create one or multiple version 4 (v4) UUIDs — randomly generated, RFC 4122-compliant unique identifiers. Choose how many UUIDs to generate (up to 100 at once) and copy them all with one click.
Why use this tool?
UUIDs are used as unique primary keys in databases, session identifiers, file names, and API request IDs. This free UUID generator creates standards-compliant IDs that are guaranteed to be globally unique.
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier formatted as 8-4-4-4-12 hexadecimal characters (e.g. 550e8400-e29b-41d4-a716-446655440000). Version 4 UUIDs are randomly generated.
How unique is a UUID?
Extremely unique. The probability of generating the same UUID twice is astronomically small — roughly 1 in 5.3 × 10^36. In practice, UUID collisions essentially never happen.
When should I use a UUID as a primary key?
UUID primary keys are ideal for distributed systems where rows are created on multiple servers simultaneously and merged later, or when you don't want sequential IDs that expose your database size.
Is this free?
Yes, completely free. Generate up to 100 UUIDs in one click.
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