UUID Generator

About UUIDs and GUIDs

A UUID (Universally Unique Identifier) or GUID (Globally Unique Identifier) is a 128-bit identifier that is generated to be unique across both space and time, with minimal coordination between systems generating them.

Different UUID Versions

• Version 4 (Random): Generated using random numbers. This is the most commonly used version as it doesn't require any special hardware or state. Each UUID v4 is generated completely randomly.
• Version 1 (Time-based): Generated using the current timestamp and MAC address of the computer. This version guarantees uniqueness across space and time but may expose system information.

How to Use This Tool

1. Select the UUID version you want to generate (Version 4 is recommended for most uses)
2. Choose your preferred output format (standard, uppercase, with braces, or without formatting)
3. Specify how many UUIDs you want to generate (1-100)
4. Click the "Generate UUID" button to create your UUIDs
5. The first UUID will appear in the top input field, and all generated UUIDs will be listed in the textarea below
6. Use the "Copy" buttons to copy either the single UUID or the entire list to your clipboard
7. Use the "Reset" button to clear all fields and start over

Common Uses for UUIDs

• Database primary keys that need to be unique across distributed systems
• Session identifiers for web applications
• Transaction IDs for distributed systems
• Random file names or document identifiers
• Any scenario where a guaranteed unique identifier is needed