Alphabetically: H
Extension File Description File Type
.h
C/C++ Header File
Developer
.h0
Movie Edit Pro Waveform Information File
Audio
.h1q
Microsoft Help Merged Query Index File
Misc
.h3m
Heroes 3 Map File
Game
.h4r
Heroes of Might and Magic IV Data File
Game
.ha
HA Compressed Archive
Compressed
.hal
HansaWorld Application Language File
Developer
.ham
Descent 2 Resource File
Game
.has
Haskell Script
Developer
.hbc
HyperBac Compressed Archive
Compressed
.hbc2
HyperBac Compressed File Archive
Compressed
.hbe
HyperBac Compressed and Encrypted Archive
Compressed
.hbx
BinHex Encoded File
Encoded
.hcc
HydroCAD Prefab Chamber Data File
Data
.hce
HydroCAD Hydrograph Data File
Data
.hci
HydroCAD IDF Data File
Data
.hcp
HydroCAD Project File
CAD
.hcr
HydroCAD Rainfall Curve Data File
Data
.hcu
Hydrograph Units Definitons File
Data
.hcx
ChartXL Chart
Data
.hd2
Poser Hand Pose File
3D Image
.hda
HotDocs Auto-Assemble File
Data
.hdb
HansaWorld Database File
Database
.hdd
Parallels Desktop Hard Disk File
Disk Image
.hdf
Hierarchical Data Format File
Data
.hdi
HotDocs Auto-Install File
Data
.hdl
HotDocs Library
Data
.hdm
HDML File
Web
.hdml
Handheld Device Markup Language File
Web
.hdmov
QuickTime HD Movie File
Video
.hdmp
Windows Heap Dump
System
.hdp
HD Photo File
Raster Image
.hdr
High Dynamic Range Image File
Raster Image
.hdz
Compressed Poser Hand Pose File
3D Image
.hex
Hexadecimal Source File
Misc
.hf
HF Image
Raster Image
.hgl
HP Graphics Language File
Vector Image
.hgt
SRTM Elevation Data File
GIS
.hh
C++ Header File
Developer
.hhc
HTML Help Table of Contents
System
.hhh
Power C Precompiled Header File
Developer
.hhk
HTML Help Index
System
.hhsl
Hockey High Score List File
Game
.hht
Help and Support Center HHT File
Text
.hi
MacMAME High Scores File
Game
.hid
Sony Ericsson Remote Settings File
Settings
.hif
Quicken Online File
Data
.hip
Houdini Project File
3D Image
.hipnc
Houdini Apprentice File
3D Image
.his
FindinSite Database Definition File
Database
.hit
The Sims Sound File
Game
.hkdb
Apple iTunes Library File
Data
.hki
WinHKI Archive
Compressed
.hki1
WinHKI HKI1 Archive
Compressed
.hki2
WinHKI HKI2 Archive
Compressed
.hki3
WinHKI HKI3 Archive
Compressed
.hkm
Havok Movie File
Video
.hl
HeuristicLab Storage File
Data
.hlb
VMS / VAX Help Library
Misc
.hlp
Windows Help File
System
.hlx
ATI Radeon Video Driver Support File
Misc
.hm3
Help & Manual 3 Project
Misc
.hma
Sony HI-MD Audio File
Audio
.hme
Windows Mobile Theme File
Settings
.hmk
Hallmark Card Studio File
Layout
.hml
HostMonitor TestList File
Data
.hms
HostMonitor Script File
Executable
.hmt
HighMAT File
Data
.hmx
Help & Manual 4 Project
Misc
.hog
Descent Mission File
Game
.hot
The Sims Sound File
Game
.hpf
High Performance Fortran File
Developer
.hpg
HPGL Plot File
Vector Image
.hpgl
HP Graphics Language Plotter File
Vector Image
.hpi
Hemera Photo Objects Image File
Raster Image
.hpj
Help Project File
System
.hpk
HPack Compressed Archive
Compressed
.hpl
HP-GL Plotter File
Vector Image
.hpp
C++ Header File
Developer
.hqx
BinHex 4.0 Encoded File
Encoded
.hr
TRS-80 Image
Raster Image
.hr2
Poser Hair File
3D Image
.hrf
Hitachi Raster Format File
Raster Image
.hrz
Compressed Poser Hair File
3D Image
.hs
Haskell Script
Developer
.hs2
HyperRESEARCH 2 Study File
Data
.hsb
HALion Sound Bank File
Audio
.hsk
Huskey Truss & Building Supply Import File
Data
.hst
History File
Data
.ht
HyperTerminal Session File
Settings
.hta
HTML Application
Executable
.htaccess
Apache HTACCESS File
Web
.htb
Audacity Help File
Data
.htc
HTML Component File
Web
.htg
HackTheGame Mission Pack
Data
.htm
Hypertext Markup Language File
Web
.html
Hypertext Markup Language File
Web
.htt
Hypertext Template File
System
.htx
HTML Extension File
Web
.htz4
HyperMaker Publication
Layout
.huh
HydroCAD Unit Hydrograph Definitions File
Data
.hus
Husqvarna Embroidery File
Misc
.hvpl
iTunes Visual Plug-in File
Plugin
.hwp
Hangul Word Processor Document
Text
.hxm
Descent 2 Resource Modification
Game
.hxs
Help 2 Compiled Help File
Web
.hxx
C++ Source Code Header File
Developer
.hyp
HYPER Compressed Archive
Compressed
.hyv
Team Manager Meet Event File
Data
.hz
Chinese (Hanzi) Text
Text