What is a PAT file?
The .PAT file extension is shared by many different programs, making it a highly versatile but confusing format. It is most commonly known as an AutoCAD Hatch Pattern File developed by Autodesk for storing repetitive drafting patterns. However, it can also be a graphics pattern for Adobe Photoshop, a fill pattern for CorelDRAW, a cross-stitch design from PCStitch, or even an audio patch file. Additionally, Synology uses the .PAT extension for DiskStation Manager Installation Files to update NAS operating systems. Because .PAT has multiple possible meanings, we strongly recommend using viewer.online/pat to identify the actual format of your file.
How to open PAT files?
Since a .PAT file could be anything from a vector graphic to a system update, guessing the right software is difficult. viewer.online/pat analyzes .PAT files to identify their exact format and creator software, shows which programs can open the file, and usually previews it safely. If you know the source of your file, you can open graphic patterns directly in image editors, or load hatch patterns into AutoCAD.
Software and tools
To manage graphic patterns, designers use Adobe Photoshop or CorelDRAW. The plain-text AutoCAD Hatch Pattern File can be inspected using simple text editors like Notepad. If the file is a system update, Synology Assistant is the correct utility to apply it to a NAS device. Audio enthusiasts might use specialized patch editors for Gravis or Korg hardware.
Best practices and troubleshooting
If you need to use a pattern in another application, we recommend file conversion to sensible target formats on convert.guru. Visual pattern designs can often be converted to .PNG or .JPG for universal viewing, while CAD hatch patterns might be exported or translated to .DWG or .DXF. Always ensure you are not trying to convert a system update file, as this will fail and corrupt the data.
Summary
viewer.online/pat directly opens and previews .PAT files in the browser, eliminating the need to install software or troubleshoot compatibility issues.