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UUID / GUID Generator

Instantly generate secure, random Version 4 UUIDs with custom formatting.

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How to Generate a UUID or GUID?

Whether you are setting up a database schema, tagging API requests, or generating unique user sessions, our free UUID/GUID Generator gives you mathematically unique identifiers instantly:

  1. Select Quantity: Type how many UUIDs you need (up to 500 at a time for bulk generation).
  2. Choose Formatting: Toggle hyphens on or off, switch between lowercase and UPPERCASE, or wrap them in `{}` braces based on your code environment requirements.
  3. Generate & Copy: Click "Generate" to create them locally, then copy the batch to your clipboard!

Frequently Asked Questions (FAQ)

What is the difference between UUID and GUID?

Technically, nothing! UUID stands for Universally Unique Identifier, which is the standard internet term. GUID stands for Globally Unique Identifier, which is simply Microsoft's specific term for the exact same standard.

Which UUID version does this tool generate?

This tool generates Version 4 (v4) UUIDs. Unlike Version 1 (which uses your device's MAC address and current time), Version 4 uses secure random numbers. It is the industry standard for creating IDs that are virtually impossible to duplicate.

Are the generated UUIDs saved on your server?

No. We use the crypto.randomUUID() API built directly into your modern web browser. The generation happens entirely on your local machine, meaning it is 100% private, highly secure, and works even without an internet connection.