Lab/UUID Generator

[ DEV TOOL ]

UUID Generator

Generate random version 4 UUIDs (Universally Unique Identifiers) using the browser's cryptographic random number generator. Support for multiple formats and bulk generation.

UUID Version

v4 (Random)

Generation

Crypto secure

Formats

4 output styles

RFC 4122 compliantBulk generationMultiple formats

Hyphenated

550e8400-e29b-41d4-a716-446655440000

Compact

550e8400e29b41d4a716446655440000

With Braces

{550e8400-e29b-41d4-a716-446655440000}

URN

urn:uuid:550e8400-e29b-41d4-a716-446655440000

Click "Generate" to create UUIDs

About UUIDs

• Version 4 UUIDs are randomly generated and contain 122 bits of random data

• Collision probability is extremely low—approximately 1 in 2122 for each UUID generated

• Format follows RFC 4122 standard: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx (where x is any hex digit and y is 8, 9, A, or B)

• Use cases include database primary keys, session identifiers, file names, and distributed system identifiers

• This tool uses crypto.randomUUID() which provides cryptographically secure random numbers