Most of the time it's recruiters who want a docx file so they can fudge certain points and mislead the employer into giving you an interview, for which they undoubtedly get paid commission for.

Just saying. Some people are fine with this. I personally don't trust any recruiter that won't happily accept a PDF or at least tell me why they want the resume changed.

That's the hardest part of making an online resume generator. No real way to generate a .doc/x...

But good idea to let people know. I'll add it to the landing page.

You can generate Open Xml documents with the SDK. https://msdn.microsoft.com/en-us/library/aa982683(v=office.1...

It's actually feasible to generate a .docx, especially when using anchors for text.

But .odt is much easier.