We have now launched new (and we believe improved) Merge PDF and Split PDF webapps, with increased file size limits, and support for more PDF files than before. In the past, there have been issues with certain PDF files, but most of those now work with the new sites.
FoxyUtils is the company behind the Merge and Split PDF web apps. With the new sites we make this connection more apparent, which will be a good basis for launching more services and creating an integrated suite of online webapps in the future.
For those who have been requesting SSL and more security for uploading their documents, we will be launching a paid ad-free service with running with SSL (https) shortly.
If you have any questions or concerns, please contact us.