A new version of JSBlend is now released. The most important enhancement in this release is the support for editing both the files. I hope that this brings the tool even closer to a general-purpose diff editor. I have also added a floating menu on the top that gives quick access to the often-needed operations - like saving the files, reloading the diffs, etc.
The screenshot on JSBlend home page has been updated.
Check out the new release at JSBlend Download Page.