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 Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
File.size 5 (Yes) 4.0 (2) 10.0 11.10 5.1

See also

Document Tags and Contributors

 Contributors to this page: erikadoyle, vinnymac, Nickolay, fscholz, Jeremie, Cobra, Sheppy, ethertank, ziyunfei, Crash
 Last updated by: erikadoyle,