GENERATOR TOOL · CLIENT-SIDE
UUID Generator
Generate random UUID v4 identifiers. Choose how many you need — up to 100 at a time. All generated locally.
Generated UUIDs
About UUIDs
128-bit identifier
A UUID is 128 bits, typically displayed as 32 hex digits with 4 dashes (8-4-4-4-12 format).
Practically unique
The chance of collision with v4 is about 1 in 2^122 — safe for all practical applications.
Database safe
Use as primary keys to avoid conflicts in distributed databases or multi-server environments.
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. It is displayed as 32 hexadecimal digits in the format 8-4-4-4-12 (e.g., 550e8400-e29b-41d4-a716-446655440000). UUIDs are designed to be practically unique across all of space and time.
When should I use UUIDs?
Use UUIDs when you need unique identifiers without a central authority: database primary keys, API resource IDs, session tokens, distributed system identifiers, or any situation where you need guaranteed uniqueness across multiple systems or databases without coordination.
What is UUID v4?
UUID v4 is a randomly generated UUID. All 122 bits are random, with 6 bits indicating the version (0100 for v4) and 2 bits for the variant (10). This is the most common UUID type, offering a collision probability of about 1 in 2^122, making it safe for virtually any application.