It converts .rar to .zip with no download, fast and easy. There are TONS of other stuff this website can do as well, like convert audio from Youtube and DailyMotion to wav and tons of other formats.
And they said there weren't online .rar extractors. Live long enough and you'll see everything.
Actually, I used this site for about 3 months, but I didn't feel like showing people.
Now, I'll be working on requests again, because PMDE is actually working.