UUID Generator

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. UUIDs are widely used in databases, APIs, distributed systems, and more — wherever uniqueness without central coordination is required.

UUID Format

UUIDs are typically represented as 36-character strings containing hexadecimal digits and hyphens. Example:

550e8400-e29b-41d4-a716-446655440000

Supported UUID Versions

• UUIDv1: Time-based, includes timestamp and MAC address.
• UUIDv3: Name-based (MD5 hashing) with namespace support.
• UUIDv4: Randomly generated (most commonly used).
• UUIDv5: Name-based (SHA-1 hashing), deterministic like v3.
• UUIDv6: Ordered-time version for modern databases (draft).
• UUIDv7: Time-based with millisecond precision and randomness (draft, ideal for logs and analytics).

Why Use a UUID?

UUIDs are great for generating unique identifiers without needing a central authority or database call. They're used in:

• Database primary keys
• API tokens and identifiers
• Session IDs
• Object references across distributed systems

How Are UUIDs Generated?

This tool uses cryptographically secure random functions and modern libraries to generate valid UUIDs completely in your browser. No internet or server connection required.

Bulk UUID Generation

Need more than one? Select a UUID version and set the count to generate multiple UUIDs instantly — perfect for batch operations or testing.