| Extension Abbreviation | Extension Full name | How to open the File Extension |
|---|---|---|
| .h | C/C++/Objective-C Header File | How to open .h file |
| .h0 | Movie Edit Pro Waveform Information File | How to open .h0 file |
| .h10 | At Home Canada 2010 Tax Return | How to open .h10 file |
| .h11 | At Home Canada 2011 Tax Return | How to open .h11 file |
| .h12 | At Home Canada 2012 Tax Return | How to open .h12 file |
| .h13 | H&R; Block Canada 2013 Tax Return | How to open .h13 file |
| .h14 | H&R; Block Canada 2014 Tax Return | How to open .h14 file |
| .h15 | H&R; Block Canada 2015 Tax Return | How to open .h15 file |
| .h16 | H&R; Block Canada 2016 Tax Return | How to open .h16 file |
| .h17 | H&R; Block Canada 2017 Tax Return | How to open .h17 file |
| .h1q | Microsoft Help Merged Query Index File | How to open .h1q file |
| .h1s | Windows Assistance Platform Help File | How to open .h1s file |
| .h261 | H.261 Video | How to open .h261 file |
| .h262 | H.262 Video | How to open .h262 file |
| .h263 | H.263 Video | How to open .h263 file |
| .h264 | H.264 Encoded Video File | How to open .h264 file |
| .h265 | H.265 Video | How to open .h265 file |
| .h2o | Battle Realms Game Data File | How to open .h2o file |
| .h2o | H2OMAP Master Project | How to open .h2o file |
| .h2p | Zebra2 Preset | How to open .h2p file |
| .h2w | H2testw File | How to open .h2w file |
| .h3 | Nintendo Wii U Hash File | How to open .h3 file |
| .h3b | Line 6 POD HD300 Edit Bundle | How to open .h3b file |
| .h3e | Line 6 POD HD300 Edit Preset File | How to open .h3e file |
| .h3m | Heroes 3 Map File | How to open .h3m file |
| .h4 | Hierarchical Data Format File | How to open .h4 file |
| .h4b | Line 6 POD HD400 Edit Bundle | How to open .h4b file |
| .h4e | Line 6 POD HD400 Edit Preset File | How to open .h4e file |
| .h4r | Heroes of Might and Magic IV Data File | How to open .h4r file |
| .h5 | Hierarchical Data Format 5 File | How to open .h5 file |
| .h5b | Line 6 POD HD500 Edit Bundle | How to open .h5b file |
| .h5e | Line 6 POD HD500 Edit Preset File | How to open .h5e file |
| .h5m | Heroes of Might and Magic V Map | How to open .h5m file |
| .h5p | HTML5 Content Package | How to open .h5p file |
| .h5s | Line 6 POD HD500 Edit Setlist File | How to open .h5s file |
| .h5u | Heroes of Might and Magic V Mod File | How to open .h5u file |
| .h6x | Soft6502 Trainer/Simulator Hex File | How to open .h6x file |
| .h77t | MGD77T Header File | How to open .h77t file |
| .ha | HA Compressed Archive | How to open .ha file |
| .haas | Everfine LED Lamp Test Results File | How to open .haas file |
| .hal | HansaWorld Application Language File | How to open .hal file |
| .hal | HotDocs Answer Library | How to open .hal file |
| .ham | Descent 2 Resource File | How to open .ham file |
| .ham | HAM Executable File | How to open .ham file |
| .hambu | RGTW Game Map File | How to open .hambu file |
| .haml | Haml Source Code File | How to open .haml file |
| .han | Amazon Kindle eBook Data File | How to open .han file |
| .handlebars | Handlebars Template | How to open .handlebars file |
| .har | HTTP Archive FIle | How to open .har file |
| .has | Haskell Script | How to open .has file |
| .hat | Duck Game Hat File | How to open .hat file |
| .hat | A Hat in Time Save File | How to open .hat file |
| .hbb | Line 6 POD HD Edit Bundle | How to open .hbb file |
| .hbc | HyperBac Compressed Archive | How to open .hbc file |
| .hbc2 | HyperBac Compressed File Archive | How to open .hbc2 file |
| .hbe | HyperBac Compressed and Encrypted Archive | How to open .hbe file |
| .hbe | Line 6 POD HD Edit Preset File | How to open .hbe file |
| .hbk | Mathcad Handbook File | How to open .hbk file |
| .hbs | Handlebars Template | How to open .hbs file |
| .hbs | Line 6 POD HD Edit Setlist File | How to open .hbs file |
| .hbx | BinHex Encoded File | How to open .hbx file |
| .hc | VeraCrypt Container File | How to open .hc file |
| .hc | Holy C Source Code File | How to open .hc file |
| .hca | High Compression Audio File | How to open .hca file |
| .hcc | HydroCAD Prefab Chamber Data File | How to open .hcc file |
| .hcd | Samsung Android Firmware File | How to open .hcd file |
| .hcdt | Thinkfree Office NEO Cell Template | How to open .hcdt file |
| .hce | HydroCAD Hydrograph Data File | How to open .hce file |
| .hcf | Compact Ham Library | How to open .hcf file |
| .hci | HydroCAD IDF Data File | How to open .hci file |
| .hcl | HotDocs Clause Archive | How to open .hcl file |
| .hcp | HydroCAD Project File | How to open .hcp file |
| .hcr | Half-Fold Card File | How to open .hcr file |
| .hcr | HydroCAD Rainfall Curve Data File | How to open .hcr file |
| .hcu | Hydrograph Units Definitons File | How to open .hcu file |
| .hcx | ChartXL Chart | How to open .hcx file |
| .hcxs | Canadian Product Incident Report Form | How to open .hcxs file |
| .hd2 | Poser Hand Pose File | How to open .hd2 file |
| .hd3d | Home Design 3D Project | How to open .hd3d file |
| .hda | HotDocs Auto-Assemble File | How to open .hda file |
| .hdb | HansaWorld Database File | How to open .hdb file |
| .hdd | Parallels Desktop Hard Disk File | How to open .hdd file |
| .hdf | Hierarchical Data Format File | How to open .hdf file |
| .hdi | Hard Disk Image | How to open .hdi file |
| .hdi | HotDocs Auto-Install File | How to open .hdi file |
| .hdk | HotDocs Registration File | How to open .hdk file |
| .hdl | HotDocs Library File | How to open .hdl file |
| .hdm | HDML File | How to open .hdm file |
| .hdml | Handheld Device Markup Language File | How to open .hdml file |
| .hdmov | QuickTime HD Movie File | How to open .hdmov file |
| .hdmp | Windows Heap Dump | How to open .hdmp file |
| .hdp | HD Photo File | How to open .hdp file |
| .hdp | MAGIX Hard Disk Project Audio File | How to open .hdp file |
| .hdpmx | HotDocs Publisher Mapping XML File | How to open .hdpmx file |
| .hdr | High Dynamic Range Image File | How to open .hdr file |
| .hdr | ESRI BIL Header File | How to open .hdr file |
| .hdrp | HDRtist Pro Document | How to open .hdrp file |
| .hds | Parallels Desktop Hard Disk File | How to open .hds file |
| .hds | Microsoft PlayReady Data File | How to open .hds file |
| .hdt | Photoshop HDR Toning Preset File | How to open .hdt file |
| .hdumx | HotDocs User Mapping XML File | How to open .hdumx file |
| .hdv | High Definition Video Format | How to open .hdv file |
| .hdx | Delphi MultiHelp Index File | How to open .hdx file |
| .hdz | Compressed Poser Hand Pose File | How to open .hdz file |
| .he | Humongous Entertainment Game Archive | How to open .he file |
| .he0 | Humongous Entertainment Game Archive | How to open .he0 file |
| .he1 | Humongous Entertainment Game Archive | How to open .he1 file |
| .he2 | Humongous Entertainment Game Archive | How to open .he2 file |
| .he4 | Humongous Entertainment Sound Archive | How to open .he4 file |
| .heartssave-ms | Microsoft Hearts Save File | How to open .heartssave-ms file |
| .heic | High Efficiency Image Format | How to open .heic file |
| .heif | High Efficiency Image Format | How to open .heif file |
| .help | Mac OS X Help Book | How to open .help file |
| .helpcfg | Adobe Community Help Configuration File | How to open .helpcfg file |
| .helpindex | Help Index Document | How to open .helpindex file |
| .hes | Hudson Entertainment Sound Format | How to open .hes file |
| .hevc | High Efficiency Video Coding File | How to open .hevc file |
| .hex | Hexadecimal Source File | How to open .hex file |
| .hex | BinHex Encoded File | How to open .hex file |
| .hf | HF Image | How to open .hf file |
| .hfd | HotDocs Form Document | How to open .hfd file |
| .hfp | HitFilm Project | How to open .hfp file |
| .hfs | HFS Disk Image File | How to open .hfs file |
| .hft | HotDocs Form Template | How to open .hft file |
| .hfv | HFS Disk Image | How to open .hfv file |
| .hgl | HP Graphics Language File | How to open .hgl file |
| .hgt | SRTM Elevation Data File | How to open .hgt file |
| .hh | C++ Header File | How to open .hh file |
| .hhc | HTML Help Table of Contents | How to open .hhc file |
| .hhh | Power C Precompiled Header File | How to open .hhh file |
| .hhi | The Sims 4 Household Data File | How to open .hhi file |
| .hhk | HTML Help Index | How to open .hhk file |
| .hhp | HTML Help Workshop Project | How to open .hhp file |
| .hhsl | Hockey High Score List File | How to open .hhsl file |
| .hht | Help and Support Center HHT File | How to open .hht file |
| .hi | MacMAME High Scores File | How to open .hi file |
| .hid | KeepSafe File | How to open .hid file |
| .hid | Sony Ericsson Remote Settings File | How to open .hid file |
| .hid2 | KeepSafe File | How to open .hid2 file |
| .hif | Quicken Online File | How to open .hif file |
| .highland | Highland Document | How to open .highland file |
| .hin | HyperChem Input File | How to open .hin file |
| .hip | Houdini Project File | How to open .hip file |
| .hipnc | Houdini Apprentice File | How to open .hipnc file |
| .his | FindinSite Database Definition File | How to open .his file |
| .hit | The Sims Sound File | How to open .hit file |
| .hiv | Windows Registry Hive File | How to open .hiv file |
| .hjt | TreePad 6 Database File | How to open .hjt file |
| .hkdb | Apple iTunes Library File | How to open .hkdb file |
| .hki | WinHKI Archive | How to open .hki file |
| .hki1 | WinHKI HKI1 Archive | How to open .hki1 file |
| .hki2 | WinHKI HKI2 Archive | How to open .hki2 file |
| .hki3 | WinHKI HKI3 Archive | How to open .hki3 file |
| .hkm | Havok Movie File | How to open .hkm file |
| .hkx | Havok Packed File | How to open .hkx file |
| .hl | HeuristicLab Storage File | How to open .hl file |
| .hlb | VMS / VAX Help Library | How to open .hlb file |
| .hlp | Windows Help File | How to open .hlp file |
| .hlsl | High Level Shader Language File | How to open .hlsl file |
| .hlx | ATI Radeon Video Driver Support File | How to open .hlx file |
| .hm3 | Help & Manual 3 Project | How to open .hm3 file |
| .hma | Sony HI-MD Audio File | How to open .hma file |
| .hme | Windows Mobile Theme File | How to open .hme file |
| .hmi | HMI Audio File | How to open .hmi file |
| .hmk | Hallmark Card Studio File | How to open .hmk file |
| .hml | HostMonitor TestList File | How to open .hml file |
| .hmp | Worms Height Map File | How to open .hmp file |
| .hms | HostMonitor Script File | How to open .hms file |
| .hmt | HighMAT File | How to open .hmt file |
| .hmx | Help & Manual 4 Project | How to open .hmx file |
| .hmxp | Help & Manual XML Project | How to open .hmxp file |
| .hmxz | Help & Manual Compressed Project | How to open .hmxz file |
| .hof | OMSI Map Parameter File | How to open .hof file |
| .hog | Descent Mission File | How to open .hog file |
| .hoi4 | Hearts of Iron IV Game Save File | How to open .hoi4 file |
| .hol | Outlook Holidays File | How to open .hol file |
| .honmod | HON Modification Manager File | How to open .honmod file |
| .hot | The Sims Sound File | How to open .hot file |
| .how2 | Visma Performit Player Configuration File | How to open .how2 file |
| .hpd | HotDocs PDF Document | How to open .hpd file |
| .hpf | High Performance Fortran File | How to open .hpf file |
| .hpf | HP9100A Program File | How to open .hpf file |
| .hpg | HPGL Plot File | How to open .hpg file |
| .hpgl | HP Graphics Language Plotter File | How to open .hpgl file |
| .hpi | Hemera Photo Objects Image File | How to open .hpi file |
| .hpj | Help Project File | How to open .hpj file |
| .hpk | HPack Compressed Archive | How to open .hpk file |
| .hpk | Tropico Game Archive | How to open .hpk file |
| .hpkg | Haiku Package File | How to open .hpkg file |
| .hpl | HP-GL Plotter File | How to open .hpl file |
| .hpp | C++ Header File | How to open .hpp file |
| .hpp | Haluha Pearls File | How to open .hpp file |
| .hpr | Internal RoboHelp File | How to open .hpr file |
| .hps | HPL Script | How to open .hps file |
| .hps | HP Digital Sender Metadata File | How to open .hps file |
| .hpt | HotDocs PDF Template | How to open .hpt file |
| .hqm | Hardcore Questing Mode Data File | How to open .hqm file |
| .hqx | BinHex 4.0 Encoded File | How to open .hqx file |
| .hr | TRS-80 Image | How to open .hr file |
| .hr2 | Poser Hair File | How to open .hr2 file |
| .hrf | Hitachi Raster Format File | How to open .hrf file |
| .hrl | Erlang Header File | How to open .hrl file |
| .hrz | Compressed Poser Hair File | How to open .hrz file |
| .hs | Haskell Script | How to open .hs file |
| .hs | Java HelpSet File | How to open .hs file |
| .hs | Motorola Flash Flex File | How to open .hs file |
| .hs | LaserTank High Scores File | How to open .hs file |
| .hs2 | HyperRESEARCH 2 Study File | How to open .hs2 file |
| .hsb | HALion Sound Bank File | How to open .hsb file |
| .hsc | Aspen HYSYS Simulation File | How to open .hsc file |
| .hsdt | Thinkfree Office NEO Show Template | How to open .hsdt file |
| .hsf | HOOPS Stream Format File | How to open .hsf file |
| .hsh | Windows Catalog Search Index File | How to open .hsh file |
| .hsk | Huskey Truss & Building Supply Import File | How to open .hsk file |
| .hst | History File | How to open .hst file |
| .ht | HyperTerminal Session File | How to open .ht file |
| .hta | HTML Application | How to open .hta file |
| .htaccess | Apache HTACCESS File | How to open .htaccess file |
| .htb | Audacity Help File | How to open .htb file |
| .htc | HTML Component File | How to open .htc file |
| .htg | HackTheGame Mission Pack | How to open .htg file |
| .htk | Hidden Markov Model Toolkit Audio | How to open .htk file |
| .htm | Hypertext Markup Language File | How to open .htm file |
| .html | Hypertext Markup Language File | How to open .html file |
| .html0 | Book Designer File | How to open .html0 file |
| .htmlz | Zipped HTML eBook | How to open .htmlz file |
| .htmod | Hardware Tycoon Game Mod File | How to open .htmod file |
| .htpasswd | Apache HTACCESS File | How to open .htpasswd file |
| .htt | Hypertext Template File | How to open .htt file |
| .htx | HTML Extension File | How to open .htx file |
| .htxt | Hanvon eBook File | How to open .htxt file |
| .htz4 | HyperMaker 4 Publication | How to open .htz4 file |
| .htz5 | HyperMaker 5 Publication | How to open .htz5 file |
| .huh | HydroCAD Unit Hydrograph Definitions File | How to open .huh file |
| .hum | OMSI Human Configuration File | How to open .hum file |
| .hus | Husqvarna Embroidery File | How to open .hus file |
| .hvc | HotDocs Variable Collection File | How to open .hvc file |
| .hve | Windows Registry Hive File | How to open .hve file |
| .hvif | Haiku Vector Icon File | How to open .hvif file |
| .hvpl | iTunes Visual Plug-in File | How to open .hvpl file |
| .hwd | Hedgewars Demo File | How to open .hwd file |
| .hwdt | Thinkfree Office NEO Word Template | How to open .hwdt file |
| .hwmap | Hedgewars Drawn Map File | How to open .hwmap file |
| .hwp | Hangul (Korean) Text Document | How to open .hwp file |
| .hwp | Hanword Document | How to open .hwp file |
| .hws | Hedgewars Saved Game | How to open .hws file |
| .hxa | Microsoft Help 2 Attribute Definition File | How to open .hxa file |
| .hxc | Microsoft Help 2 Collection Definition File | How to open .hxc file |
| .hxe | Microsoft Help 2 Sample Definition File | How to open .hxe file |
| .hxk | Microsoft Help 2 Index File | How to open .hxk file |
| .hxm | Descent 2 Resource Modification | How to open .hxm file |
| .hxn | Hexagon Model File | How to open .hxn file |
| .hxs | Help 2 Compiled Help File | How to open .hxs file |
| .hxt | Microsoft Help 2 Table of Contents File | How to open .hxt file |
| .hxx | C++ Source Code Header File | How to open .hxx file |
| .hydra | Hydra Image Filter Program File | How to open .hydra file |
| .hyp | HYPER Compressed Archive | How to open .hyp file |
| .hyp | Dictionary Information File | How to open .hyp file |
| .hype | Hype Document | How to open .hype file |
| .hyperesources | Hype Resources Folder | How to open .hyperesources file |
| .hypesymbol | Hype Symbol File | How to open .hypesymbol file |
| .hypetemplate | Hype Document Template | How to open .hypetemplate file |
| .hyv | Team Manager Meet Event File | How to open .hyv file |
| .hz | Chinese (Hanzi) Text | How to open .hz file |
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