| File Extension: | PTO |
| File Type Description: | Hugin Project File |
| File Type Developer: | Unknown Developer |
| Primary Associated Software: | Hugin |
| Primary Software Developer: | Open Source |
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Open Source developed the PTO file extension, also know as a Hugin Project File file, for the Hugin software package. Our internal web tracking data indicates that Windows 10 operating system users, and those living in China, are the most likely to use Hugin Project File files. In most cases, these users are surfing the internet using the Google Chrome browser.
 | Hugin by Open Source |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | Linux |
 | FreeBSD |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .JSH | Freedom Scientific | Developer Files | JAWS Script Header File |
| .ASE | Adobe Systems Incorporated | Settings Files | Adobe Swatch Exchange File |
| .MKS | Matroska | Data Files | Matroska Elementary Stream File |
| .UTXT | Open Source | Text Files | Unicode Text File |
| .FAM | Electronic Arts | Game Files | The Sims Family Data Game File |
| .PAM | Open Source | Raster Image Files | Portable Arbitrary Map |
| .OPUS | Open Source | Audio Files | Opus Audio File |
| .BPW | Open Source | Encoded Files | Bitser Password File |
| .PDX | Adobe Systems Incorporated | Data Files | Adobe Acrobat Index File |
| .PHZ | Algoryx Simulation | Game Files | Algodoo Phun Compressed Phunlet |
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