Blob.size

The Blob.size property returns the size in bytes of the Blob or a File.

Syntax

var sizeInBytes = blob.size

Value

A number.

Example

// fileInput is a HTMLInputElement: <input type="file" multiple id="myfileinput">
var fileInput = document.getElementById("myfileinput");

// files is a FileList object (simliar to NodeList)
var files = fileInput.files;

for (var i = 0; i < files.length; i++) {
  console.log(files[i].name + " has a size of " + files[i].size + " Bytes");
}

Specifications

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

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
File.size 5 4.0 (2) 10.0 11.10 5.1
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
File.size No support No support No support No support No support

See also

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/blob/size