File Size and Naming - Optimize Files

You should not use special characters in a filename.  This increases the chance that it will interfere with the file fully loading and the system mishandling the filename. 

Typically, PDFs with a smaller file size will be rendered faster and it depends on how big a single page is. By default we limit file size to 25MB.  Please reach out if your file cannot be reduced below this limit.  The number of pages does not affect performance. It's essential that you optimize your documents for the web. See Optimize a PDF from Adobe's website for more information. There are more improvement techniques that we can suggest:

1. Save the file as Optimized PDF. In Adobe Acrobat, choose File > Save As Other > Optimized PDF. Instructions >>
2. Avoid using high-resolution images -- 150 dpi resolution for scanned images shall be enough for screens, especially for low powered devices;
3. Try to use JPEG encoding for color images/photos in RGB colorspace when possible;
4. Avoid using expensive compositions/effects such as transitions/masking -- flatten transparency;
5. Avoid using PDF generators (or don't create content) that produce ineffective PDF output (e.g. LibreOffice creates lots of tiny images for vector elements/pictures it does not understand);
6. If there is such a setting, use web-optimized PDF output/linearization;
7. Fix or don't produce corrupted PDFs that do not conform to the PDF32000 specification.