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Seb Nilsson
Seb Nilsson

Posted on • Originally published at sebnilsson.com on

dotnet-guid: Generate GUIDs/UUIDs with the Command Line

There have been a few projects, although not many, which I've been involved in, where generating GUIDs/UUIDs has been important. For that, I used to use online-tools like https://guidgenerator.com, but when I switched machine, the autocomplete in my browser lost that link.

Minimally for this reason, and mostly for fun, I decided to write a .NET Core Global Tool which quickly generates one or multiple GUIDs/UUIDs, in whatever format could be needed.

Installation

Download the .NET Core SDK 2.1 or later. The install the dotnet-guid .NET Global Tool, using the command-line:

dotnet tool install -g dotnet-guid

Usage

Usage: guid [arguments] [options]

Arguments:
  Count Defines how may GUIDs/UUIDs to generate. Defaults to 1.

Options:
  -?|-h|--help Show help information
  -n Formatted as 32 digits:
                00000000000000000000000000000000
  -d Formatted as 32 digits separated by hyphens:
                00000000-0000-0000-0000-000000000000
  -b Formatted as 32 digits separated by hyphens, enclosed in braces:
                {00000000-0000-0000-0000-000000000000}
  -p Formatted as 32 digits separated by hyphens, enclosed in parentheses:
                (00000000-0000-0000-0000-000000000000)
  -x Formatted as four hexadecimal values enclosed in braces,
                where the fourth value is a subset of eight hexadecimal values that is also enclosed in braces:
                {0x00000000,0x0000,0x0000,{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}}
  -e Defines if the GUIDs/UUIDs should be empty, using zero-values only.
  -u Defines if the GUIDs/UUIDs generated should be upper-cased letters.

Examples

To get a single GUID/UUID, simply type:

guid

To get 3 random GUIDs/UUIDs, with letters in upper-case, formatted with brackets:

guid 3 -b -u

You can find the source-code on GitHub, the package on Nuget and the latest builds on MyGet.

You can find a great list of more .NET Core Global Tools on GitHub, maintained by Nate McMaster.

Top comments (1)

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katnel20 profile image
Katie Nelson

Nice job and good use of the McMaster package.

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