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File Extensions beginning with the letter 'H'


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Extension click to sort by Extension Description currently sorted on Description Format MIME Type
hst
htz
hpf
HPPCL Hewlett-Packard Printer Control Language
HDF Hierarchical Data Format
HDS Hierarchical Data System
HRF Hitachi Raster Format
HYP (1) Archive; Hyper
HDR (1) Database; Egret; PC-File
HP (1) Picture; Hewlett-Packard Graphics Language (plotter)
HYP (2) Adobe Illustrator Hyphenation Dictionary
HP (2) C++ Header; same as HPP
HDR (2) Text; Description of an EXE, using output from EXEHDR.EXE redirected to a file for Intel VTune.
HJT Treepad PIM data file. There is also a Java clone JreePad.
HAP Archive
HA Archive
HQX Archive; Macintosh compressed archive (use BinHex 4.0 to decompress) (MIME: application/mac-binhex40)
hqx Binhex
HRF Bitmap Picture; Hitachi
HSI Bitmap Picture; Image Alchemy; see JPG
HS2 Bitmap Picture; Postering Monochrome Picture
hhc BlueSky HyperHelp contents
hhk BlueSky HyperHelp keywords (index)
H-- C Header
h C header file
H C program header
H C programming language header
HPP C++ Header
HXX C++ Header
hpp C++ header file
H++ C++ Header; "H++" extension not allowed in 16-bit DOS; see H__
H__ C++ Header; Same as H++ in 16-bit DOS; see H++
HH C++ Header; see H++
HPP C++ program header
HCX Chart; Harvard Chart XL
HPW CompuServe Home Page Wizard (16-bit)
HYZ Corel WordPerfect hyphenation
HLP DataCAD Windows Help file
HXM Descent2 HAM file extension
HZ Document; ASCII and Chinese text
HED Document; High-Edit
HTF Document; Hyper-G Text Format
HTX Document; Hypertext
HTX Extended HTML template
HPI Font Information; GEM
HBF Font; Hanzi Bitmap Font 1.1
HOF Hall Of Fame
HDP HD Photo. Microsoft-proprietary lossy raster image format for photography. Previously known as Windows Media Photo. [HDPhoto]
HLX Helix, Nuts&Bolts utility
HLP Help file
HLP Help file
HLP Help file
HLP Help file - May be DOS, or 16- or 32-bit Windows
HTC Help file contents for Microsoft Windows CE; see 2BP, HLP, HTP
HPJ Help project description for Windows help compiler
HTP Help Topic file for Microsoft Windows CE; see HLP, HTC
HGL Hewlett-Packard Graphics Language; see PLT
HPS Hewlett-Packard PrintSmart Document collection settings used with HTML Documents; see HPY, INI
HPY Hewlett-Packard Web PrintSmart style sheet used with HPS
HPGL Hewlitt-Packard Graphics Language (printer image)
HPG Hewlitt-Packard Graphics Language (printer image). Usually HPGL.
HDF Hierarchical Data Format for NCSA
HED HighEdit document
HST History (uncommon?)
HST History file
HSF HOOPS Stream File. details [HSF]
HGL HP Graphics Language drawing
HTR HTML-like script
HT3 HTML; Internet Document, Version 3 (uncommon)
HT Hyper Terminal
HT Hyper Terminal file
HIN HyperChem
HT HyperTerminal
HT HyperTerminalTM file
HTM HyperText Markup [HTML] text/html
HTML HyperText Markup Language [HTML] text/html
htt HyperText Template
HCR IBM HCD/HCM production configuration file
HCM IBM HCM configuration file
HSM Include; Assembly language header (University of Waterloo Engineering convention); see INC
HOG Lucas Arts Dark Forces WAD file
HEX Macintosh BinHex 2.0 file
HQX Macintosh BinHex 4.0 file
HH Map file. Contains topic IDs and map numbers for each of the topics in a Help system. Allows the running application to send the user the appropriate context-sensitive help topic
HBK Mathcad handbook
HL$ Microsoft compressed HLP (DOS help file); decompress with UNPACK.EXE
HTX Microsoft FrontPage Database results, HTML-like query script; see IDC
HEL Microsoft Hellbender saved game
HXS Microsoft Help 2.0
HHC Microsoft HTML Help Contents; see HHK, CHM
HHK Microsoft HTML Help Index; see HHC, CHM
HTT Microsoft Hypertext Template
HTT Microsoft Internet Explorer Hyper-Text Template (MIME: text/webviewhtml)
HOT Mosaic Internet address
htx MS IIS HTML template
hlp MSWindows help file
hpj MSWindows help project
HDF National Center for Supercomputing Applications (NCSA) geospatial Hierarchical Data Format file
HRZ Picture
HHH Power C pre-compiled header
HWD Presentation; Hollywood
HHP ProComm Plus Host Mode Help
HEX Program image with all references resolved, for EEPROM programming
hlp Program on-line Help File
HCOM Sound Tools HCOM format
HRT Sound; Hornet Packer
HPM Text; Hewlett-Packard NewWave
HP8 Text; NewWave Write
HDW Vector Drawing; Harvard Draw for Windows; SDSC Image Tools
HPJ Visual Basic Help Project
HM Windows Help context IDs used by MAKEHM.EXE
HT Windows Hyper-Terminal


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