| .jspx |
XML Java Server Page |
| .jnlp |
Java Web Start File |
| .json |
JavaScript Object Notation File |
| .jhtml |
Java HTML Web Page |
| .jws |
Java Web Services File |
| .jss |
JavaScript Style Sheet File |
| .jst |
Jnes Save State |
| .jcz |
Liquid Motion Animation |
| .jspa |
Java Servlet Alias |
| .jvs |
JavaScript Proxy Autoconfig File |
| .kit |
CodeKit File |
| .map |
Quake Engine Map File |
| .mht |
MHTML Web Archive |
| .mhtml |
MIME HTML File |
| .mspx |
Microsoft ASP.NET Web Page |
| .mvc |
Movie Collector Catalog |
| .maff |
Mozilla Archive Format File |
| .muse |
Adobe Muse Website Project |
| .mjs |
ECMAScript Modules (ESM) files |
| .master |
ASP.NET Master Page |
| .mapx |
Mapjects Client Webparts File |
| .moz |
Mozilla Cache File |
| .mvr |
IBM HotMedia Multimedia File |
| .nzb |
NewzBin Usenet Index File |