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GUID generator

Create GUIDs in the format used by Windows, .NET, SQL Server and Visual Studio: uppercase and in braces, ready to paste into code or the registry.

Free and private. Everything runs in your browser, nothing is uploaded.

How it works

  1. GenerateThe format is preset for this page. Press New list for fresh IDs.
  2. Adjust if neededChange the count, case or hyphens.
  3. CopyCopy the IDs or download them as a text file.

GUIDs for Microsoft tools

A GUID (globally unique identifier) is the same 128 bit value as a UUID, written the way Microsoft tools expect. This page starts with uppercase letters and braces, as in {3F2504E0-4F89-41D3-9A0C-0305E82C3301}, the format of the Windows registry, COM classes and many configuration files.

For C# use Guid.Parse on the plain form, for SQL Server uniqueidentifier columns the form without braces. Turn the options on or off to match what your code needs, and generate a whole batch for seed data or installers.

Random and private

These are version 4 GUIDs from the secure random generator of your browser, identical in quality to Guid.NewGuid(). Nothing is sent to a server.

Frequently asked questions

Is this the same as Guid.NewGuid()?

Yes in format and randomness: both create version 4 identifiers with 122 random bits.

Are these UUIDs unique?

In practice yes. v4 has 122 random bits; v7 has 74 random bits per millisecond plus a counter.

What is the difference between UUID and GUID?

GUID is Microsoft's name for the same thing. They are often written in uppercase and in braces.

Can I see when a UUID was created?

For versions 1, 6 and 7, yes. Paste it into the decoder.

Are the IDs sent anywhere?

No. They are generated in your browser.