No, but you can concatenate your .pde files into one source file, and then run that through the "processing-helper" for processing.js. If you clone the Processing.js repo (links on https://github.com/processing-js/processing-js) then you can load the ./tools/processing-helper.html in a browser (ideally from localhost, not file), and then just paste in your code, hit "convert", and out comes the compiled JS source.
That said, there's not all that much benefit to precompiling, since Processing.js is a browser technology. It's not "an editor", a sketch running using Processing.js is just a webpage, and all mobile devices support web pages.