Free online UUID generator tool. Generate Version 1 (time-based) or Version 4 (random) UUIDs for unique identifiers. Copy to clipboard with one click.
Frequently Asked Questions
What is a UUID?
UUID (Universally Unique Identifier) is a 128-bit number used to identify information in computer systems. It is formatted as a string of 36 characters separated by hyphens, like: 550e8400-e29b-41d4-a716-446655440000.
What UUID versions are supported?
This tool supports UUID v1 (timestamp-based), UUID v4 (random), and UUID v7 (Unix timestamp in milliseconds). UUID v4 is the most commonly used version.
Can I generate multiple UUIDs at once?
Yes! Use the quantity selector to generate up to 100 UUIDs at once. Each UUID is unique.
Are the generated UUIDs truly unique?
UUID v4 uses cryptographically secure random numbers, making the probability of generating the same UUID twice extremely low (1 in 2^128).