UUID Generator & Validator

What is a UUID?

A Universally Unique Identifier (UUID) is a 128-bit label used for information in computer systems. When generated according to standard methods, UUIDs are, for practical purposes, unique. Their uniqueness does not depend on a central registration authority or coordination between the parties generating them, unlike most other numbering schemes.

A standard UUID is represented as 32 hexadecimal (base-16) digits, displayed in five groups separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters (32 alphanumeric characters and four hyphens).

UUID Versions Supported

• UUID v4 (Random): The most common version. It relies purely on random numbers. Our generator uses cryptographically secure random number generation (CSPRNG) to ensure extremely low probability of collisions.
• UUID v7 (Timestamp-based): A modern standard optimized for databases. It includes a 48-bit Unix timestamp at the beginning, making it naturally sortable by creation time. This is highly recommended as primary keys in databases.
• UUID v1 (Timestamp & MAC): An older standard that includes a timestamp and the MAC address of the generating computer. Our web-based generator simulates the MAC address component with a random node identifier for privacy.

Client-Side Security & Privacy

This UUID Generator and Validator runs completely within your web browser. Whether you are generating a batch of random identifiers or validating existing ones, the data never leaves your device. All computations are done using modern JavaScript APIs (like crypto.getRandomValues), meaning this tool works perfectly offline after the initial page load.