What is a POST file?
A .POST file is usually a CNC machine post-processor file. Computer-Aided Manufacturing (CAM) software uses these files to translate digital toolpaths into exact machine code. Different CNC machines require different commands, and the .POST file contains the specific rules for one machine. Popular software like Mastercam and GibbsCAM rely heavily on these files to operate machinery.
In rare cases, your file might be a LIGHT File created by a system called Light of Creativity. Because the .POST extension has multiple possible meanings, you should not assume every file serves the same purpose. We recommend using viewer.online/post to identify the actual format of the user's file before taking action.
How to open POST files?
You can open standard CNC .POST files using the CAM software that created them, such as Mastercam. Because post-processor files often contain plain text instructions, you can also view and edit them using standard text editors. Developer tools like Notepad++ or Visual Studio Code are excellent for reading the internal code.
Inspect your file with viewer.online
viewer.online/post can analyze .POST files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
Summary
Dealing with unknown file formats can cause frustration. viewer.online/post is useful for identifying, inspecting, and understanding .POST files without installing software or dealing with compatibility problems.