UUID / GUID Generator

How to Use the UUID Generator

Enter the number of UUIDs you want to generate (1 to 1000), then customize the format using the checkboxes. Choose uppercase for capital letters, or keep it lowercase. Toggle hyphens on or off to match your format requirements. Click "Generate" to create your UUIDs instantly.

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. Version 4 (v4) UUIDs are generated randomly and are the most commonly used type. They appear in the format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, where x and y are random hexadecimal digits.

Common Uses

UUIDs are widely used in databases as primary keys, API request identifiers, session tokens, distributed systems, file naming, and anywhere you need globally unique identifiers without central coordination.

Format Options

Uppercase: Converts all letters to uppercase (A-F instead of a-f). Hyphens: Includes the standard dashes in the UUID format. Without hyphens, you get a 32-character continuous string.

Frequently Asked Questions

Can I generate more than 1000 UUIDs at once?

You can generate up to 1000 at a time with this tool. For larger batches, generate multiple times and combine the results.

Are these UUIDs truly unique?

v4 UUIDs have such an enormous possible space (2^122 combinations) that the statistical probability of collision is negligible for any practical application.

Is my data stored anywhere?

No. Everything runs in your browser. Your UUIDs are generated locally and never sent to any server.

What's the difference between UUID and GUID?

GUID (Globally Unique Identifier) is Microsoft's term for the same concept. UUID is the standard term used elsewhere. They are functionally identical.