Hi Keith, this list could obviously change in the future, but as it stands now, here is the answer to your question.
Important: Some of these conversions required additional licenses. You can contact sales if you don't already have a license to see what is required for a particular conversion.
The following file types can be converted to XOD or PDF. On Desktop/Server HTML, EPUB, SVG outputs are also possible
ALL PLATFORMS (Mobile/Server/Desktop)
pdf
docx, doc (with Direct Office Converter Add-on)
pptx (with Direct Office Converter Add-on)
xlsx (with Direct Office Converter Add-on)
xps, oxps, xod
bmp
emf
gif
jpe
jpg
jfif
jpeg
jpf
jpx
jp2
j2k
j2c
jpc
png
tif
tiff
hdp
wdp
wmf
jxr
md
txt, xml, cpp, hpp, monotext and plaintext (all treated as text files).
WEBVIEWER SERVER
All of the above
With Direct Office Converter still an Add-on the following is also included
ppt, xls, rtf, odt, odp, ods, vds, vdx
html (with HTML2PDF Module)
DESKTOP/SERVER
html (with HTML2PDF Module)
WINDOWS DESKTOP/SERVER
dib (device independent bitmap)
rle
Is there a FULL list of file types that are converted via interop on Windows OS?
Word
docx
docm
dotx
doc
dotm
dot
rtf
mht
wps
wri
odt
txt
html (without HTML2PDF Module)
Excel
xlsx
xlsm
xltx
ods
PowerPoint
pptx
pptm
potx
ppt
pot
potm
ppsx
pps
ppsm
odp
Publisher
pub
Visio
vsd
vsx
vss
vst
vtx
vsw