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
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 5 | 12 | 4 | 10 | 11 | 5.1 |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | No | No | Yes | No | No | No | No |