Files with the .qxb extension use the application/vnd.quark.quarkxpress MIME type. This page explains what the extension is for and how it is typically used.
| Extension | .qxb |
| MIME Type | application/vnd.quark.quarkxpress |
| Category | application |
| Source | iana |
| Other Extensions | .qxd, .qxt, .qwd, .qwt, .qxl |