A GUID (Globally Unique Identifier), also known as a UUID (Universally Unique Identifier), is a 128-bit number used to uniquely identify information in computer systems. This tool generates a Version 4 (v4) UUID, which is the most common type, created using random numbers.

When to Use a GUID/UUID?

• Database Keys: They are often used as primary keys in database tables. Since they are globally unique, you can generate them anywhere without worrying about collisions, which is great for distributed systems.
• Unique Identifiers: Use them to uniquely identify anything from a user session, a transaction, or an error log entry.
• Security: They are useful for creating unguessable identifiers for things like password reset links or API keys.

How It Works

This tool uses the browser's built-in `crypto.randomUUID()` method, which is a cryptographically secure way to generate a v4 UUID. Simply click the "Generate New GUID" button to create a new, random identifier. You can then copy it to your clipboard with a single click.