Lightning

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Upload an image, optimize the PNG, create a data URI

Click to browse for a file or drag and drop

Turn off PngCrush

Lightning.gs converts PNG, JPEG and Gif images to a data URI. If the image is a PNG it uses a client-side JavaScript port of PngCrush to optimise your image first.

It works fine in Firefox and Chrome on Mac and Windows. It does work in IE10 but using client-side PngCrush in this browser takes forever and a day. Works fine using Mac Safari but not on Windows.

instructions
The PNG image is being optimized. Hold on, it's coming