Deprecated, please use Chris Wilson’s WebMIDIAPI Shim I made a NPAPI browser plugin that gives you access to the MIDI devices connected to your computer directly from within your browser. The plugin is built with the
JUCE library. You can download the plugin from Github or directly from here. In the zip you find the plugin file and a simple test page. The comments in main.js explain how to use the plugin and its API. In the README file you’ll find instructions on how to install the plugin in various browsers. Currently on OSX Chrome and Safari are supported, and on Windows Chrome is supported.