J I C

J I C is a Javascript Image Compressor using HTML5 Canvas & File API that allows you to compress your jpeg & png images before uploading to the server (100% client-side and no extra libraries requried!)

Could you imagine how much bandwidth we can save if Google, Twitter and r Facebook implement this image compression before we upload those 5MB photos? This approach will make the internet faster!!

You can check the working demo here : http://makeitsolutions.com/labs/jic/

How it works

To compress the image, first it converts an image object to canvas and then compress it with the canvas method toDataURL(mimetype, quality)

Then to upload the image object it uses the XMLHTTPRequest method sendAsBinary and sends the data url of the compressed image to the server and that's all!! Easy huh?

Example

J I C has only 2 methods: compress & upload. Check it out:

//========= Step 1 - Client Side Compression ===========

//Images Objects
var source = document.getElementById("source_img"),
    target_img = document.getElementById("target_img");

//(NOTE: see the examples/js/demo.js file to understand how this object could be a local image 
//from your filesystem using the File API)

//An Integer from 0 to 100
var quality =  80;  

//This function returns an Image Object 
target_img.src = jic.compress(source_image,quality).src;  


//======= Step 2 - Upload compressed image to server =========

//Here we set the params like endpoint, var name (server side) and filename
var server_endpoint = 'upload.php',
	server_var_name = 'file',
	filename = "new.jpg";

//This is the callback that will be triggered once the upload is completed
var callback = function(response){ console.log(response); }

//Here goes the magic
jic.upload(target_img, server_endpoint, server_var_name, filename, callback);

Enjoy!