Files.com offers a built-in PDF viewer for previewing PDF documents. This PDF viewer does not fully support all capabilities of PDFs. Specifically, it does not support fillable forms or embedded PDF documents. Additionally, certain rendering issues may occur with certain PDF files.

Our PDF viewer is built using a 3rd party PDF engine called PDF.js. Due to the 3rd party nature of the viewer, we aren't able to accept bug reports that relate to PDF rendering. If you need to view fillable form data, or if a PDF isn't previewing perfectly, please download the PDF and view it locally.

We are tracking customer interest in a more sophisticated PDF engine, and we may consider changing PDF engines in the future. If you have a specific example of a PDF that you use in your business that cannot be viewed in our existing PDF viewer, please send it to us so we can add it to the improvement request we are tracking.

When integrations for editing Office documents have been disabled, previews for Office-style documents will be generated as PDF files, which can result in some unexpected formatting.