18 File Extensions starting with H
| .H | C Header File |
| .HDR | Apollo HDRU Image |
| .HDR | ArcInfo Binary Image |
| .HDRU | Apollo HDRU Image |
| .HED | Hi-Eddi Image |
| .HF | HF Image |
| .HIR | Hires C64 Image |
| .HPGL | HP Graphics Language Image |
| .HPI | Hemera Photo Image |
| .HPP | C++ Header File |
| .HR | TRS 80 Image |
| .HRU | HRU Image |
| .HRZ | Slow Scan Television Image |
| .HTA | HTML Application |
| .HTA | Hemera Thumbs Image |
| .HTM | Hypertext Markup Language Source File |
| .HTML | Hypertext Markup Language Source File |
| .HWP | Hangul Word Processor Document |