What is UUID Generator?

UUID Generator is a tool for creating UUIDs / GUIDs in bulk. It supports UUID v1 and v4, and lets you choose whether to include hyphens or use uppercase output.

It is useful when you need unique identifiers for databases, sessions, logs, test data, or file naming.

How to Use

1. Choose the UUID version.
2. Set whether to use hyphens and uppercase output.
3. Choose how many UUIDs to generate.
4. Click Generate UUID and review the result.

Main Settings

UUID Version

• v1: time-based generation
• v4: random-based generation

You can choose the format that fits your use case.

Use Hyphens

Turn this on to keep the standard UUID format, or off if you need a continuous string without separators.

Use Uppercase

This switches the result to uppercase output. It is useful when you need to match an existing format.

Use Cases

• Creating unique identifiers for databases or applications
• Preparing multiple UUIDs for testing
• Generating values for logs, transactions, or file names

Output Examples

For v4 with hyphens and uppercase enabled:

F47AC10B-58CC-4372-A567-0E02B2C3D479

For v1 without hyphens and with uppercase enabled:

5A99E9E01C8A11E8AEFF362B9E155667

Things to Keep in Mind

• UUIDs are relatively long, so they may not fit use cases that need short IDs
• v1 and v4 are generated differently, so choose the version based on your requirements
• UUIDs are identifiers, not secret values for cryptographic use