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NSwag is a Swagger 2.0 API (OpenAPI) toolchain for .NET, Web API, TypeScript (jQuery, AngularJS, Angular 2+, Aurelia, KnockoutJS, and more) and other platforms, written in C#. The Swagger specification uses JSON and JSON Schema to describe a RESTful web API. The NSwag project provides tools to generate Swagger specifications from existing ASP.NET Web API controllers and client code from these Swagger specifications.

This NPM module requires .NET 4.6.1+ or .NET Core 1.0/1.1/2.0 to be installed on your system!


Global installation

Install the package globally:

npm install nswag -g

Show available commands:

nswag help

Project installation

Install the package for the current project:

npm install nswag --save-dev

Show available commands:

"node_modules/.bin/nswag" help

Change runtime

The full .NET Framework in x64 mode is preferred as execution environment. If you need to run the command line tool in x86 mode use

nswag run version --x86

Add the switch --core to the command to execute one of the .NET Core binaries (automatically detects whether .NET Core 1.0 or 1.1 is installed):

nswag run version --core

To specify what .NET Core binaries to execute, either use

nswag run version --core 1.0


nswag run version --core 1.1


nswag run version --core 2.0


Run the following command to compile and copy the current NSwag console binaries into the NPM module directory binaries directory:


To run the NodeJS binary locally:

cd "src/NSwag.Npm"
node "bin/nswag" version

The JavaScript command line tool can be found here:


To publish the package (login required):