If you're creating content in a Document, Video, or Any File body type, you will notice that Kapost has an area where you can preview the content you've uploaded into your post.
We currently use Box Viewer to view previews in Kapost - please let your Success Manager know if you have any questions about this.
These are the extensions Box preview supports out of the box: c, css, doc, docx, js, json, m, md, pl, pdf, ppt, pptx, py, txt, xls, xlsx, xml
On top of that we have a cloud convert extension that will the convert the following formats to a pdf if they fail to preview:
CAD: dwg, dxf
Document: abw, djvu, docm, docx, html, lwp, odt, page, page.zip, rst, rtf, sdw, tex, txt, wpd, wps, zabw
Ebook: azw, azw3 azw4, cbc, cbr, cbz, chm, epub, fb2, htm, htmlz, lit, lrf, mobi, pdb, pml, prc, rb, snb, tcr, txtz
Image: 3fr, arw, bmp, cr2, crw, dcr, dng, erf, ico, mos, mrw, nef, odd, orf, pef, ppm, psdm, raf, raw, tif, tiff, webp, x3f, xcf, xps
Presentation: key, key.zip, odp, pps, ppsx, ppt, pptm, pptx, sda
Spreadsheet: csv numbers, numbers.zip, ods, sdc, xls, xlsm, xlsx
Vector: ai, cdr, cgm, emf, eps, ps, sk, sk1, svg, svgz, vsd, wmf
If you are trying to upload something to Kapost and it is not one of these file types, it will upload but not preview.