| File extension |
File description |
Developer/Producer |
| .h |
C/C++/Objective-C Header File |
N/A |
| .h0 |
Movie Edit Pro Waveform Information File |
MAGIX |
| .h10 |
At Home Canada 2010 Tax Return |
H&R Block |
| .h11 |
At Home Canada 2011 Tax Return |
H&R Block Canada |
| .h12 |
At Home Canada 2012 Tax Return |
H&R Block Canada |
| .h1q |
Microsoft Help Merged Query Index File |
Microsoft |
| .h1s |
Windows Assistance Platform Help File |
Microsoft |
| .h264 |
H.264 Encoded Video File |
N/A |
| .h2o |
Battle Realms Game Data File |
Liquid Entertainment |
| .h3m |
Heroes 3 Map File |
New World Computing |
| .h4r |
Heroes of Might and Magic IV Data File |
New World Computing |
| .ha |
HA Compressed Archive |
N/A |
| .hal |
HansaWorld Application Language File |
HansaWorld |
| .ham |
Descent 2 Resource File |
N/A |
| .has |
Haskell Script |
N/A |
| .hbc |
HyperBac Compressed Archive |
Xceleon Technologies |
| .hbc2 |
HyperBac Compressed File Archive |
Xceleon Technologies |
| .hbe |
HyperBac Compressed and Encrypted Archive |
Xceleon Technologies |
| .hbk |
Mathcad Handbook File |
Mathsoft |
| .hbx |
BinHex Encoded File |
N/A |
| .hcc |
HydroCAD Prefab Chamber Data File |
HydroCAD Software Solutions |
| .hce |
HydroCAD Hydrograph Data File |
HydroCAD Software Solutions |
| .hcf |
Compact Ham Library |
Zaplots |
| .hci |
HydroCAD IDF Data File |
HydroCAD Software Solutions |
| .hcl |
HotDocs Clause Archive |
HotDocs |
| .hcp |
HydroCAD Project File |
HydroCAD Software Solutions |
| .hcr |
HydroCAD Rainfall Curve Data File |
HydroCad Software Solutions |
| .hcu |
Hydrograph Units Definitons File |
HydroCAD Software Solutions |
| .hcx |
ChartXL Chart |
Harvard Graphics |
| .hd2 |
Poser Hand Pose File |
Smith Micro |
| .hda |
HotDocs Auto-Assemble File |
HotDocs |
| .hdb |
HansaWorld Database File |
HansaWorld |
| .hdd |
Parallels Desktop Hard Disk File |
Parallels |
| .hdf |
Hierarchical Data Format File |
N/A |
| .hdi |
Hard Disk Image |
N/A |
| .hdk |
HotDocs Registration File |
HotDocs |
| .hdl |
HotDocs Library File |
HotDocs |
| .hdm |
HDML File |
Openwave |
| .hdml |
Handheld Device Markup Language File |
Openwave |
| .hdmov |
QuickTime HD Movie File |
Apple |
| .hdmp |
Windows Heap Dump |
Microsoft |
| .hdp |
HD Photo File |
Microsoft |
| .hdpmx |
HotDocs Publisher Mapping XML File |
HotDocs |
| .hdr |
High Dynamic Range Image File |
HDRsoft |
| .hdrp |
HDRtist Pro Document |
Ohanaware |
| .hds |
Microsoft PlayReady Data File |
Microsoft |
| .hdt |
Photoshop HDR Toning Preset File |
Adobe Systems |
| .hdumx |
HotDocs User Mapping XML File |
HotDocs |
| .hdv |
High Definition Video Format |
JVC |
| .hdx |
Delphi MultiHelp Index File |
Autodesk |
| .hdz |
Compressed Poser Hand Pose File |
Smith Micro |
| .heartssave-ms |
Microsoft Hearts Save File |
Microsoft |
| .help |
Mac OS X Help Book |
Apple |
| .hex |
Hexadecimal Source File |
N/A |
| .hf |
HF Image |
N/A |
| .hfd |
HotDocs Form Document |
HotDocs |
| .hfs |
HFS Disk Image File |
N/A |
| .hft |
HotDocs Form Template |
HotDocs |
| .hfv |
HFS Disk Image |
Apple |
| .hgl |
HP Graphics Language File |
Hewlett-Packard |
| .hgt |
SRTM Elevation Data File |
N/A |
| .hh |
C++ Header File |
N/A |
| .hhc |
HTML Help Table of Contents |
Microsoft |
| .hhh |
Power C Precompiled Header File |
Power C |
| .hhk |
HTML Help Index |
Microsoft |
| .hhsl |
Hockey High Score List File |
Evert Etienne |
| .hht |
Help and Support Center HHT File |
Microsoft |
| .hi |
MacMAME High Scores File |
The MAME Team |
| .hid |
Sony Ericsson Remote Settings File |
Sony Ericsson |
| .hif |
Quicken Online File |
Intuit |
| .hip |
Houdini Project File |
Side Effects Software |
| .hipnc |
Houdini Apprentice File |
Side Effects Software |
| .his |
FindinSite Database Definition File |
PHDCC |
| .hit |
The Sims Sound File |
N/A |
| .hiv |
Windows Registry Hive File |
Microsoft |
| .hjt |
TreePad 6 Database File |
Freebyte.com |
| .hkdb |
Apple iTunes Library File |
Apple |
| .hki |
WinHKI Archive |
N/A |
| .hki1 |
WinHKI HKI1 Archive |
N/A |
| .hki2 |
WinHKI HKI2 Archive |
N/A |
| .hki3 |
WinHKI HKI3 Archive |
N/A |
| .hkm |
Havok Movie File |
Havok |
| .hl |
HeuristicLab Storage File |
HeuristicLab |
| .hlb |
VMS / VAX Help Library |
N/A |
| .hlp |
Windows Help File |
Microsoft |
| .hlsl |
High Level Shader Language File |
Microsoft |
| .hlx |
ATI Radeon Video Driver Support File |
N/A |
| .hm3 |
Help & Manual 3 Project |
EC Software |
| .hma |
Sony HI-MD Audio File |
Sony |
| .hme |
Windows Mobile Theme File |
Microsoft |
| .hmi |
HMI Audio File |
Human Machine Interfaces |
| .hmk |
Hallmark Card Studio File |
Hallmark |
| .hml |
HostMonitor TestList File |
KS-Soft |
| .hmp |
Worms Height Map File |
Team17 Software |
| .hms |
HostMonitor Script File |
KS-Soft |
| .hmt |
HighMAT File |
Microsoft and Panasonic |
| .hmx |
Help & Manual 4 Project |
EC Software |
| .hmxp |
Help & Manual XML Project |
EC Software |
| .hmxz |
Help & Manual Compressed Project |
EC Software |
| .hog |
Descent Mission File |
N/A |
| .hol |
Outlook Holidays File |
Microsoft |
| .honmod |
HON Modification Manager File |
HON Modification Manager |
| .hot |
The Sims Sound File |
Electronic Arts |
| .hpd |
HotDocs PDF Document |
HotDocs |
| .hpf |
High Performance Fortran File |
N/A |
| .hpg |
HPGL Plot File |
Hewlett-Packard |
| .hpgl |
HP Graphics Language Plotter File |
Hewlett-Packard |
| .hpi |
Hemera Photo Objects Image File |
Hemera |
| .hpj |
Help Project File |
Microsoft |
| .hpk |
Tropico Game Archive |
PopTop Software |
| .hpl |
HP-GL Plotter File |
Hewlett-Packard |
| .hpp |
C++ Header File |
N/A |
| .hps |
HPL2 Script |
Frictional Games |
| .hpt |
HotDocs PDF Template |
HotDocs |
| .hqx |
BinHex 4.0 Encoded File |
N/A |
| .hr |
TRS-80 Image |
Tandy |
| .hr2 |
Poser Hair File |
Smith Micro |
| .hrf |
Hitachi Raster Format File |
Hitachi |
| .hrl |
Erlang Header File |
Ericsson |
| .hrz |
Compressed Poser Hair File |
Smith Micro |
| .hs |
Haskell Script |
N/A |
| .hs2 |
HyperRESEARCH 2 Study File |
ResearchWare |
| .hsb |
HALion Sound Bank File |
Steinberg Media Technologies |
| .hsc |
Aspen HYSYS Simulation File |
Aspen Technology |
| .hsf |
HOOPS Stream Format File |
Tech Soft 3D |
| .hsh |
Windows Catalog Search Index File |
Microsoft |
| .hsk |
Huskey Truss & Building Supply Import File |
Huskey Truss & Building Supply |
| .hst |
History File |
N/A |
| .ht |
HyperTerminal Session File |
Hilgraeve |
| .hta |
HTML Application |
Microsoft |
| .htaccess |
Apache HTACCESS File |
N/A |
| .htb |
Audacity Help File |
Audacity |
| .htc |
HTML Component File |
Microsoft |
| .htg |
HackTheGame Mission Pack |
Chaozz Software |
| .htm |
Hypertext Markup Language File |
N/A |
| .html |
Hypertext Markup Language File |
N/A |
| .html0 |
Book Designer File |
N/A |
| .htmlz |
Zipped HTML eBook |
N/A |
| .htpasswd |
Apache HTACCESS File |
N/A |
| .htt |
Hypertext Template File |
Microsoft |
| .htx |
HTML Extension File |
Microsoft |
| .htxt |
Hanvon eBook File |
Hanvon |
| .htz4 |
HyperMaker 4 Publication |
Bersoft |
| .htz5 |
HyperMaker 5 Publication |
Bersoft |
| .huh |
HydroCAD Unit Hydrograph Definitions File |
HydroCAD Software Solutions |
| .hus |
Husqvarna Embroidery File |
Viking |
| .hvc |
HotDocs Variable Collection File |
HotDocs |
| .hvpl |
iTunes Visual Plug-in File |
Apple |
| .hwd |
Hedgewars Demo File |
Hedgewars Project |
| .hwmap |
Hedgewars Drawn Map File |
Hedgewars Project |
| .hwp |
Hanword Document |
Hancom |
| .hws |
Hedgewars Saved Game |
Hedgewars Project |
| .hxa |
Microsoft Help 2 Attribute Definition File |
Microsoft |
| .hxc |
Microsoft Help 2 Collection Definition File |
Microsoft |
| .hxe |
Microsoft Help 2 Sample Definition File |
Microsoft |
| .hxk |
Microsoft Help 2 Index File |
Microsoft |
| .hxm |
Descent 2 Resource Modification |
N/A |
| .hxn |
Hexagon Model File |
DAZ Productions |
| .hxs |
Help 2 Compiled Help File |
Microsoft |
| .hxt |
Microsoft Help 2 Table of Contents File |
Microsoft |
| .hxx |
C++ Source Code Header File |
N/A |
| .hydra |
Hydra Image Filter Program File |
Adobe Systems |
| .hyp |
Dictionary Information File |
Adobe Systems |
| .hype |
Hype Document |
Tumult |
| .hyv |
Team Manager Meet Event File |
HY-TEK Sports Software |
| .hz |
Chinese (Hanzi) Text |
N/A |
