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html5-filesaver.js

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html5-filesaver.js

An HTML5 saveAs() FileSaver implementation

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FileSaver.js

FileSaver.js implements the HTML5 W3C saveAs() FileSaver interface in browsers that do not natively support it. There is a FileSaver.js demo that demonstrates saving various media types.

FileSaver.js is the solution to saving files on the client-side, and is perfect for webapps that need to generate files, or for saving sensitive information that shouldn't be sent to an external server.

Bower Installation

bower install FileSaver.js --save-dev

Looking for canvas.toBlob() for saving canvases? Check out canvas-toBlob.js for a cross-browser implementation.

Supported browsers

BrowserConstructs asFilenamesMax Blob SizeDependencies
Firefox 20+BlobYes800 MiBNone
Firefox < 20data: URINon/aBlob.js
ChromeBlobYes500 MiBNone
Chrome for AndroidBlobYes500 MiBNone
IE 10+BlobYes600 MiBNone
Opera 15+BlobYes500 MiBNone
Opera < 15data: URINon/aBlob.js
Safari 6.1+*BlobNo?None
Safari < 6data: URINon/aBlob.js

Feature detection is possible:

try {
    var isFileSaverSupported = !!new Blob;
} catch (e) {}

IE < 10

It is possible to save text files in IE < 10 without Flash-based polyfills. See ChenWenBrian and koffsyrup's saveTextAs() for more details.

Safari 6.1+

Blobs may be opened instead of saved sometimes—you may have to direct your Safari users to manually press +S to save the file after it is opened. Using the application/octet-stream MIME type to force downloads can cause issues in Safari.

iOS

saveAs must be run within a user interaction event such as onTouchDown or onClick; setTimeout will prevent saveAs from triggering. Due to restrictions in iOS saveAs opens in a new window instead of downloading, if you want this fixed please tell Apple how this bug is affecting you.

Syntax

FileSaver saveAs(in Blob data, in DOMString filename)

Examples

Saving text

var blob = new Blob(["Hello, world!"], {type: "text/plain;charset=utf-8"});
saveAs(blob, "hello world.txt");

The standard W3C File API Blob interface is not available in all browsers. Blob.js is a cross-browser Blob implementation that solves this.

Saving a canvas

var canvas = document.getElementById("my-canvas"), ctx = canvas.getContext("2d");
// draw to canvas...
canvas.toBlob(function(blob) {
    saveAs(blob, "pretty image.png");
});

Note: The standard HTML5 canvas.toBlob() method is not available in all browsers. canvas-toBlob.js is a cross-browser canvas.toBlob() that polyfills this.

Tracking image

Contributing

The FileSaver.js is the development code, and are not minified. The FileSaver.min.js is the production code, and are minified using uglifyjs.

You need to install NodeJs and Grunt.

Installing Dependencies:

npm install

Please make sure you run grunt build before submitting a pull request.

FAQs

Package last updated on 24 Jul 2015

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