Allow Additional File Extensions

If you wish to allow more file extensions to your File Upload or File Upload Drag & Drop fields, you will need to add the extraAllowedFileExtensions (and possibly extraFileKinds) config items to your Craft config file.

1

Modify the config/general.php file

Add the following to your config/general.php file:

'extraAllowedFileExtensions' => 'heic',

'extraFileKinds' => [
    // merge .heic into list of Image file kinds
    'image' => [
        'extensions' => ['heic'],
    ],
],

The extraFileKinds part will merge heic into the list of valid Image file types and treat it as such when you check off Image in the Allowed File Kinds setting for the field inside the Freeform form builder.

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To add multiple file extensions, the config settings would look something like this:

'extraAllowedFileExtensions' => 'psb, css, less, pcss, sass, scss, styl',

'extraFileKinds' => [
    // merge .psb into list of Photoshop file kinds
    'photoshop' => [
        'extensions' => ['psb'],
    ],
    // register new "Stylesheet" file kind
    'stylesheet' => [
        'label' => 'Stylesheet',
        'extensions' => ['css', 'less', 'pcss', 'sass', 'scss', 'styl'],
    ],
]

If you do not categorize the file extensions like this, you must allow ALL file types for your field by unchecking all file types in the Allowed File Kinds settings for the additional extensions to work.

2

Enable the File Kinds in the File Upload field

• Inside the form builder, click on any of the File Upload or File Upload Drag & Drop fields in your form.
• In the File Kinds setting in the property editor, please check off all applicable file kinds to be allowed.
• Save your form and verify it's working correctly.

Finished!