| .hipnc |
Houdini Apprentice File |
| .hs |
Haskell Script |
| .hxs |
Help 2 Compiled Help File |
| .hdr |
High Dynamic Range Image File |
| .hpg |
HPGL Plot File |
| .hal |
HansaWorld Application Language File |
| .hxx |
C++ Source Code Header File |
| .hwp |
Hangul (Korean) Text Document |
| .hol |
Outlook Holidays File |
| .hps |
HPL Script |
| .hlsl |
High Level Shader Language File |
| .hbs |
Handlebars Template |
| .hum |
OMSI Human Configuration File |
| .haml |
Haml Source Code File |
| .hin |
HyperChem Input File |
| .h5 |
Hierarchical Data Format version 5 File |
| .hcxs |
Canadian Product Incident Report Form |
| .htc |
HTML Component File |
| .htg |
HackTheGame Mission Pack |
| .hydra |
Hydra Image Filter Program File |
| .hrl |
Hyper-V Replica Log (HRL) file or Erlang Header File |
| .html0 |
Book Designer File |
| .hbk |
Mathcad Handbook File |
| .h2p |
Zebra2 Preset |