Most of the readable documents are PDF documents, sometimes browser doesn’t support PDF files then you cannot open PDF files. Pdfescape is a free online service that will allow you to open all PDF files online without installing any program.
You can upload PDF files from your computer or URL after upload your document you can view your document in pdfescape. Pdfescape provides lots of options for modifying PDF documents. It includes add text, shapes, links and new form fields etc.
It will support Internet Explorer 6, Firefox 2, Safario 2,Google Chrome and Opera 9.5.it allow only to view files upto 2 MB and 50 pages.