DocsPal

First decide whether another format is actually needed. DocsPal's viewer may be sufficient when the task is simply to read a file, while conversion suits a recipient who needs a different application. The format selector includes legacy document and ebook types as well as current office files. Confirm both the original and target types in the conversion route rather than assuming that every listed type converts to every other type.

DocsPal allows five files at a time. Documents, images and ebooks can be up to 50 MB each; audio, video and archives up to 200 MB. After conversion it shows a download link, with email delivery of that link as an option. The FAQ says uploaded files are removed when conversion finishes and outputs remain for up to five days. Password-protected archives and protected PDFs are excluded.