# Installation >This is a [Visual Studio Code](https://code.visualstudio.com/download) extension. It is best installed from the [on-line extensions marketplace](https://marketplace.visualstudio.com/items?itemName=svaberg.swmf-grammar), or from inside VS Code `Preferences/Extensions` and search for `swmf-grammar`. _Alternatively_, the extension can be built and installed manually as in the next section. This should only be required for developers. ## Manual installation from source code 1. Clone the repository and enter into the folder ```bash git clone git@github.com:svaberg/SWMF-grammar.git cd SWMF-grammar ``` 2. Install the required packages with `npm` ```bash npm install ``` 3. Create a package using `vsce` ```bash vsce package ``` This should generate a `swmf-grammar-?.?.?.vsix` file in the current directory. 4. Manually install the extension in VS Code (you may want to replace the wildcards in the version number) ```bash code --install-extension swmf-grammar-?.?.?.vsix ``` To test the installation, open the current folder in VS Code ```bash code . ``` and view the file `demo.in`.