Foldr can automatically preview all file types natively supported by iOS.

This includes, but is not limited to:

• Word documents (.doc & .docx)
• Excel spreadsheets (.xls & .xlsx)
• Powerpoint presentations (.ppt & .pptx)
• Pages documents (.pages)
• Keynote presentations (.key)
• Numbers spreadsheets (.numbers)
• Images (.jpg, .tiff, .gif)
• Adobe PDF (.pdf)
• Media files (.mp3, .aiff, .m4a, .wav, .mov, .mp4, .m4v)
• Web pages (.htm & .html)
• Text files (.txt, .rtf)