Pym's, web based disassembler (beta)
Pym's, web based disassembler allows to upload a file and disassemble it online. Then you can browse the code, see an example here.
Pym's disassembler is a google app engine powered application that is able to disassemble some valid PE files or hexadecimal string. You can try it using the following forms.
The app makes use of Pym's library, pefile and networkx libraries.