apply_filters( 'mime_types', string[] $wp_get_mime_types )

Filters the list of mime types and file extensions.

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Description

This filter should be used to add, not remove, mime types. To remove mime types, use the ‘upload_mimes’ filter.

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Parameters

$wp_get_mime_types string[]
Mime types keyed by the file extension regex corresponding to those types.

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Source

File: wp-includes/functions.php. View all references 

return apply_filters(
	'mime_types',
	array(
		// Image formats.
		'jpg|jpeg|jpe'                 => 'image/jpeg',
		'gif'                          => 'image/gif',
		'png'                          => 'image/png',
		'bmp'                          => 'image/bmp',
		'tiff|tif'                     => 'image/tiff',
		'webp'                         => 'image/webp',
		'ico'                          => 'image/x-icon',
		'heic'                         => 'image/heic',
		// Video formats.
		'asf|asx'                      => 'video/x-ms-asf',
		'wmv'                          => 'video/x-ms-wmv',
		'wmx'                          => 'video/x-ms-wmx',
		'wm'                           => 'video/x-ms-wm',
		'avi'                          => 'video/avi',
		'divx'                         => 'video/divx',
		'flv'                          => 'video/x-flv',
		'mov|qt'                       => 'video/quicktime',
		'mpeg|mpg|mpe'                 => 'video/mpeg',
		'mp4|m4v'                      => 'video/mp4',
		'ogv'                          => 'video/ogg',
		'webm'                         => 'video/webm',
		'mkv'                          => 'video/x-matroska',
		'3gp|3gpp'                     => 'video/3gpp',  // Can also be audio.
		'3g2|3gp2'                     => 'video/3gpp2', // Can also be audio.
		// Text formats.
		'txt|asc|c|cc|h|srt'           => 'text/plain',
		'csv'                          => 'text/csv',
		'tsv'                          => 'text/tab-separated-values',
		'ics'                          => 'text/calendar',
		'rtx'                          => 'text/richtext',
		'css'                          => 'text/css',
		'htm|html'                     => 'text/html',
		'vtt'                          => 'text/vtt',
		'dfxp'                         => 'application/ttaf+xml',
		// Audio formats.
		'mp3|m4a|m4b'                  => 'audio/mpeg',
		'aac'                          => 'audio/aac',
		'ra|ram'                       => 'audio/x-realaudio',
		'wav'                          => 'audio/wav',
		'ogg|oga'                      => 'audio/ogg',
		'flac'                         => 'audio/flac',
		'mid|midi'                     => 'audio/midi',
		'wma'                          => 'audio/x-ms-wma',
		'wax'                          => 'audio/x-ms-wax',
		'mka'                          => 'audio/x-matroska',
		// Misc application formats.
		'rtf'                          => 'application/rtf',
		'js'                           => 'application/javascript',
		'pdf'                          => 'application/pdf',
		'swf'                          => 'application/x-shockwave-flash',
		'class'                        => 'application/java',
		'tar'                          => 'application/x-tar',
		'zip'                          => 'application/zip',
		'gz|gzip'                      => 'application/x-gzip',
		'rar'                          => 'application/rar',
		'7z'                           => 'application/x-7z-compressed',
		'exe'                          => 'application/x-msdownload',
		'psd'                          => 'application/octet-stream',
		'xcf'                          => 'application/octet-stream',
		// MS Office formats.
		'doc'                          => 'application/msword',
		'pot|pps|ppt'                  => 'application/vnd.ms-powerpoint',
		'wri'                          => 'application/vnd.ms-write',
		'xla|xls|xlt|xlw'              => 'application/vnd.ms-excel',
		'mdb'                          => 'application/vnd.ms-access',
		'mpp'                          => 'application/vnd.ms-project',
		'docx'                         => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
		'docm'                         => 'application/vnd.ms-word.document.macroEnabled.12',
		'dotx'                         => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
		'dotm'                         => 'application/vnd.ms-word.template.macroEnabled.12',
		'xlsx'                         => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
		'xlsm'                         => 'application/vnd.ms-excel.sheet.macroEnabled.12',
		'xlsb'                         => 'application/vnd.ms-excel.sheet.binary.macroEnabled.12',
		'xltx'                         => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
		'xltm'                         => 'application/vnd.ms-excel.template.macroEnabled.12',
		'xlam'                         => 'application/vnd.ms-excel.addin.macroEnabled.12',
		'pptx'                         => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
		'pptm'                         => 'application/vnd.ms-powerpoint.presentation.macroEnabled.12',
		'ppsx'                         => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
		'ppsm'                         => 'application/vnd.ms-powerpoint.slideshow.macroEnabled.12',
		'potx'                         => 'application/vnd.openxmlformats-officedocument.presentationml.template',
		'potm'                         => 'application/vnd.ms-powerpoint.template.macroEnabled.12',
		'ppam'                         => 'application/vnd.ms-powerpoint.addin.macroEnabled.12',
		'sldx'                         => 'application/vnd.openxmlformats-officedocument.presentationml.slide',
		'sldm'                         => 'application/vnd.ms-powerpoint.slide.macroEnabled.12',
		'onetoc|onetoc2|onetmp|onepkg' => 'application/onenote',
		'oxps'                         => 'application/oxps',
		'xps'                          => 'application/vnd.ms-xpsdocument',
		// OpenOffice formats.
		'odt'                          => 'application/vnd.oasis.opendocument.text',
		'odp'                          => 'application/vnd.oasis.opendocument.presentation',
		'ods'                          => 'application/vnd.oasis.opendocument.spreadsheet',
		'odg'                          => 'application/vnd.oasis.opendocument.graphics',
		'odc'                          => 'application/vnd.oasis.opendocument.chart',
		'odb'                          => 'application/vnd.oasis.opendocument.database',
		'odf'                          => 'application/vnd.oasis.opendocument.formula',
		// WordPerfect formats.
		'wp|wpd'                       => 'application/wordperfect',
		// iWork formats.
		'key'                          => 'application/vnd.apple.keynote',
		'numbers'                      => 'application/vnd.apple.numbers',
		'pages'                        => 'application/vnd.apple.pages',
	)
);

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Changelog

Changelog
Version Description
3.5.0 Introduced.

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User Contributed Notes

  1. Skip to note 1 content
    You must log in to vote on the helpfulness of this noteVote results for this note: 0You must log in to vote on the helpfulness of this note
    Contributed by Lovro Hrust —

    Add Webp image type to allowed media types. Note that this type may still not display correctly in media library, since its dimensions might be incorrectly read by image processing functions.

    /**
 * Add webp to allowed media types
 */
function wpdocs_add_webp( $wp_get_mime_types ) {
	$wp_get_mime_types['webp'] = 'image/webp';
	return $wp_get_mime_types;
}

add_filter( 'mime_types', 'wpdocs_add_webp' );

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