Returns the media type (MIME) of the file represented by a File object.

Syntax

var name = file.type;

Value

A string, containing the media type(MIME) indicating what type of the file is it for example "image/png" for PNG images

Example

<input type="file" multiple onchange="showType(this)">
function showType(fileInput) {
  var files = fileInput.files;

  for (var i = 0; i < files.length; i++) {
    var name = files[i].name;
    var type = files[i].type;
    alert("Filename: " + name + " , Type: " + type);
  }
}

Note: Based on the current implementation, browsers won't actually read the bytestream of a file to determine its media type. It is assumed based on the file extension; a PNG image file renamed to .txt would give "text/plain" and not "image/png". Moreover, file.type is generally reliable only for common file types like images, HTML documents, audio and video. Uncommon file extensions would return an empty string. Client configuration (for instance, the Windows Registry) may result in unexpected values even for common types. Developers are advised not to rely on this property as a sole validation scheme.

 

Specifications

Specification Status Comment
File API
The definition of 'type' in that specification.
Working Draft Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support13 Yes3.61016 Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes Yes No No No Yes

See also

Document Tags and Contributors

Last updated by: sideshowbarker,