Extract text from JMG files
To convert your JMG file to another format, you need Adobe Photoshop or other Raster Image software.
To convert other file formats to the "Legacy Bitmap" file type, you need software like Adobe Photoshop or a similar tool.
The .jmg filename extension is a legacy raster image format with two primary origins, both of which cause significant compatibility headaches for modern users. Most commonly, it represents a 16-bit Adaptive RLE Compressed Bitmap, an archaic graphics standard that stores high-depth grayscale or color data using Run-Length Encoding to save space. These files are effectively "orphaned" - modern operating systems like Windows 11 and macOS Preview cannot natively render them, often displaying a generic "Unknown File" icon.
Alternatively, as noted in older documentation for Adobe Photoshop (specifically version 7.0), a .jmg file may simply be a standard JPG image that was saved with a non-standard extension due to a naming convention quirk or batch processing script. In this scenario, the file contains standard JPEG data but fails to open because software does not recognize the extension. Users typically encounter these files when digging through old backups, game assets, or scientific imaging archives. The most practical solution is converting them to widely supported formats like JPG for web use, PNG to preserve lossless quality, or PDF for archiving.
Convert.Guru analyzes your JMG file, detects the exact format, and lets you read the text inside.
Users also converted JPG and PNG files.
If you want to convert JMG file to , you can use Adobe Photoshop or similar software from the "Legacy Raster Image Storage" category. In the File menu, look for Save As… or Export….
To convert files to JMG, try Adobe Photoshop or another comparable tool in the "Legacy Raster Image Storage" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our JMG converter.