| filename extensions | art-335 |
| hfx | |
| TechTarget file types | art-336 | HFX-Harvard-Graphics-F-X-File-Harvard-Graphics |
| TechTarget file types | art-336 | HFX-Hollywood-FX-Special-Effects-File-Pinnacle-Systems-Inc |
| TechTarget file types | art-336 | HFX-HotFax-data |
| TechTarget file types | art-336 | HFX-Pinnacle-Hollywood-FX-special-effects-file |
| TechTarget file types | art-336 | HFX-US-Robotics-Rapid-Comm-voice-data-file |
| English | eng-000 | Harvard Graphics F/X File |
| English | eng-000 | Hollywood FX Special Effects File |
| English | eng-000 | HotFax data |
| English | eng-000 | Pinnacle Hollywood FX special effects file |
| English | eng-000 | US Robotics Rapid Comm voice data file |