.OFN file extension

This is the basic program to work with .OFN extension

Microsoft Office Professional

Microsoft Office Professional Other Office Documents...

Office 2021 is a one-time purchase that comes with classic apps like Word, Excel, and PowerPoint for PC or Mac, and does not include any of the services that come with a Microsoft 365 subscription. One-time purchases don’t have an upgrade option, which means if you plan to upgrade to the next major release, you'll have to buy it at full price... (more)

The program works with the following extensions: mdb, pdt, xnk, hol, mdw, psw, ibc, pwd, ppa, ics, fwp, pwi, msg, pwt, pwz, vcf, mag, vcs, iqy, ade, csv, oqy, dot, adn, dqy, rqy, obt, adp, pot, slk, ofn, xla, obz, odc, mad, xlk, mda, xll, mdz, xlt, mde, prf, mdn, fav, dif, mdt, xlam, xltm, docm, xltx, docx, dotm, ppsx, dotx, pptm, pptx, accda, accdc, accde, accdr, accdt, accdu, pothtml, wizhtml, ppthtml, dochtml, dothtml, xlshtml, mdbhtml, xlthtml and spdesignjs

.OFN extension is also supported by the following programs:

Microsoft Office

Microsoft Office Other Office Documents...

Create word documents, presentations, databases, and spreadsheets.
Microsoft Office 97, Standard Edition

Microsoft Office 97, Standard Edition Other Office Documents...