What is a PGM file?
The .PGM file extension most commonly stands for Portable Gray Map Image. Developer Jef Poskanzer created this format for the Netpbm project. A .PGM file stores a grayscale image using simple text or binary data. Because the format is very simple, many scientific and academic programs use it to store raw image data. However, a .PGM file can also be a CNC woodworking program file used by SCM Group Xilog. Additionally, audio producers might see .PGM files as Akai MPC Program Files that store sampler instrument settings.
How to open PGM files?
If your file is an image, you can open it with graphics software like ImageMagick, GIMP, or Adobe Photoshop. If it is a text-based .PGM image (starting with a "P2" header), you can also open it in a text editor like Notepad++. If your file is a CNC program, you must use the Xilog software. If it is an audio file, you need an Akai MPC sampler or a compatible audio editor.
Best practices and troubleshooting
If you do not know what kind of .PGM file you have, do not force it to open in an image editor. First, open the file in a simple text editor to look for a header. A Portable Gray Map Image will always start with "P2" or "P5". If you see different code, it might be a CNC file or an audio preset.
Software and tools
To share an image .PGM file on the web, you should convert it. We recommend using convert.guru to convert .PGM files into standard web formats like .PNG or .JPG.
Summary
Because .PGM has multiple possible meanings, you should use viewer.online/pgm to identify the actual format of your file. viewer.online/pgm analyzes .PGM files to identify their exact format and creator software, shows which programs can open the file, and usually previews it. Ultimately, viewer.online/pgm directly opens and previews .PGM files in the browser, eliminating the need to install software or troubleshoot compatibility issues.