Computer file extensions - H
Updated: 07/13/2023 by Computer Hope
Below is a listing of each of the different file extensions that begin with the letter "H." If you are looking for a file extension that starts with a different letter, click the corresponding beginning letter below.
| H | |
|---|---|
| .HAR | JSON (JavaScript Object Notation) formatted archive file, containing HTTP (hypertext transfer protocol) performance data. |
| .HBK | Mathcad handbook file. |
| .HDL | Procomm Plus alternate download file listing. |
| .HDR | 1. Procomm Plus message header 2. High Dynamic Range file. |
| .HDX | Help index. |
| .HEIC | High Efficiency Image File format file. |
| .HEIF | High Efficiency Image File format file. |
| .HEX | Hex dump. |
| .HFI | GEM HP font info. |
| .HGL | HP graphics language graphic. |
| .HH | C++ header. |
| .HHH | Precompiled header for Power C. |
| .HHP | Help data for Procomm Plus. |
| .HLP | Files that contain the help feature used in Windows. Note: These files cannot be read from the MS-DOS command line. |
| .HPGL | CAD (computer-aided design) file. |
| .HQX | Apple Macintosh Binhex text conversion file. Compressed file extracted and used with various compression utilities. |
| .HSQ | Data files associated with the Qaz trojan. |
| .HSS | Photoshop hue and saturation information. |
| .HST | 1. History file. 2. Procomm Plus history file. 3. Host file. |
| .HTA | Hypertext application file that runs applications from HTML (hypertext markup language) document. |
| .HTM | Web page files containing HTML. |
| .HTML | Web page files containing HTML. |
| .HTT | Microsoft Hypertext template file used with Microsoft Internet Explorer 4.0. The folder.htt is an example of this file type. |