UUID Generator

How to Use the UUID Generator

Select the UUID version you need, choose how many to generate, and click the Generate button. You can copy individual UUIDs or all at once. Use the validator to check if an existing UUID is valid.

Features

• Multiple Versions - Generate v4 (random), v1-like (time-based), or nil UUIDs
• Bulk Generation - Generate up to 100 UUIDs at once
• Format Options - Lowercase, uppercase, or no hyphens
• UUID Validator - Check if a UUID is valid and identify its version
• Easy Copy - Copy individual UUIDs or all at once

Useful with the Hash Generator for checksums and the Unix Timestamp Converter when tracking created-at fields.

UUID Versions Explained

• UUID v4 (Random) - The most commonly used version. Generated using random or pseudo-random numbers. Extremely low collision probability.
• UUID v1 (Time-based) - Based on timestamp and node ID (usually MAC address). Reveals creation time but guarantees uniqueness.
• Nil UUID - A special UUID with all zeros. Used as a placeholder or default value.

Frequently Asked Questions

What is a UUID?

UUID stands for Universally Unique Identifier. It's a 128-bit number used to uniquely identify information in computer systems. UUIDs are standardized by RFC 4122.

What's the difference between UUID and GUID?

GUID (Globally Unique Identifier) is Microsoft's implementation of UUID. They are essentially the same thing and can be used interchangeably.

Can UUIDs collide?

While theoretically possible, the probability of UUID v4 collision is astronomically low. You would need to generate about 2.71 quintillion UUIDs to have a 50% chance of collision.