I once scanned a document the wrong way. The resulting PDF was upside down and I was quite annoyed as I had to send it to people I did not know well.
I was able to find a bunch of free software to do so. But I did not want to download and install one of them for this one-time task. I looked for an online service, but I was not able to find one.
I thought that such service should exist. So few days later, I wrote and deployed RotatePDF.net.
Terms of service
RotatePDF.net is a free service. It comes with absolutely no warranty, express or implied. Use at your own risk.
About RotatePDF.net Author
My name is Philippe Bernard. I live in Paris, France. I'm a software engineer and I make Web sites and stuff.