mw.fileTypes.labels Extension Point

Add custom labels for file type

Since R2025a

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You can add custom labels for different file types in MATLAB using the mw.fileTypes.labels extension point.

To add a custom label for a file type in MATLAB®:

  1. Create a JSON-formatted file named extensions.json and place it in a folder named resources.

  2. Add a set of JSON declarations to extensions.json that defines one or more labels.

  3. Add the folder containing the resources folder with the extensions.json file to the MATLAB path. To add the folder to the path, use the addpath function or right-click the folder in the Files panel and select Add to Path > Selected Folders and Subfolders.

This JSON code shows the basic structure of the mw.fileTypes.labels extension point.

{
    "mw.fileTypes.labels": {
        "xlsx": "Microsoft Excel Worksheet",
        "docx": "Microsoft Word Document"
    }
}

For more information about using extension points, see Extend MATLAB Using Extension Points.

Properties

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Required Properties

File type label to display in the Files panel for files with a specific extension, specified as a JSON string.

Specify the property name as the lowercase file type extension or file type group that you want to add a label for. Specify the property value as the label you want to display for that file type extension.

For example, to display Microsoft Excel Worksheet as the label for files with a .xlsx extension, use the JSON declaration "xlsx": "Microsoft Excel Worksheet". For more information about file type groups, see mw.fileTypes.groups.

Version History

Introduced in R2025a

See Also

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