| Extension | File Type Description | Mime Type |
| .323 | H.323 Internet Telephony | text/h323 |
| .asm | ASM File | text |
| .asmx | ASMX File | text |
| .aspx | Web Form | text |
| .c | C File | text |
| .cpp | Visual C++ Source Code File | text |
| .css | Cascading Style Sheet Document | text/css |
| .cxx | Visual C++ Source Code File | text |
| .def | DEF File | text |
| .diz | DAMN NFO Viewer File | text/nfo |
| .dlm | Microsoft Download Manager | text/dlm |
| .dwt | Microsoft Office FrontPage Dynamic Web Template | text/html |
| .hpp | HPP File | text |
| .htc | HTC File | text/x-component |
| .htm | Web Page | text/html |
| .html | Web Page | text/html |
| .htt | HyperText Template | text/webviewhtml |
| .hxx | HXX File | text |
| .inc | Website Include File | text |
| .iqy | Internet Inquiry File | text/x-ms-iqy |
| .java | Java Source File | text |
| .nfo | DAMN NFO Viewer File | text/nfo |
| .nvr | NVR File | text |
| .odc | Microsoft Office Data Connection | text/x-ms-odc |
| .pl | PL File | text |
| .plg | PLG File | text |
| .qht | QHT FIle | text/x-html-insertion |
| .qhtml | QHTML File | text/x-html-insertion |
| .rqy | Excel OLE DB Query File | text/x-ms-rqy |
| .rt | RealText Clip | text/vnd.rn-realtext |
| .sct | Windows Script Component | text/scriptlet |
| .sed | Self Extracting File | text |
| .shtm | Web Page | text |
| .shtml | Web Page | text |
| .sol | Flash MX (and higher) Shared Object | text/plain |
| .sor | Snapshot File | text/plain |
| .sql | Structured Query Language Database | text |
| .talk | Text to Speech | text/x-speech |
| .text | ASCII Text | text |
| .tsv | Tab Separated Values File | text/tab-separated-values |
| .uls | Internet Location Service | text/iuls |
| .vcf | vCard File | text/x-vcard |
| .wsc | Windows Script Component | text/scriptlet |
| .x | Direct3D Object | text |
| .xml | XML Document | text/xml |
| .xsl | XSL Stylesheet | text/xml |
| .xsl | XSL Stylesheet | text/xml |