Perhaps I suggest Google Doc Viewer, this will allow you to show several types of embedded files, where download is usually requested:
https://docs.google.com/viewer/
You can also use this inline on your own website using iframe.
The following is a list of supported file types:
- Microsoft Word (.DOC and. DOCX)
- Microsoft Excel (.XLS and .XLSX)
- Microsoft PowerPoint (.PPT and .PPTX)
- Adobe Portable Document Format (.PDF)
- Apple Pages (.PAGES)
- Adobe Illustrator (.AI)
- Adobe Photoshop (.PSD)
- Tagged Image File Format (.TIFF)
- Autodesk AutoCad (.DXF)
- (.SVG)
- PostScript (.EPS,.PS)
- TrueType (.TTF)
- XML (.XPS)
- (.ZIP .RAR)
PDF , , - . , , .