CGM Converter
Convert files to and from CGM online for free. Fast, secure, and high-quality file conversion with no sign-up or software required.
Maximum file size is 1GB
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Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.
Upload your file
Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.
Choose an output format
Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.
Convert & download
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What is a CGM file?
The Computer Graphics Metafile (CGM) is an open, platform-independent standard defined by ISO/IEC 8632 for the storage and exchange of 2D vector graphics, raster images, and text. Unlike proprietary formats, CGM is explicitly designed for interoperability in engineering, aviation, and technical illustration, utilizing a clear-text, binary, or character-based encoding. It serves as a specific standard in industries like the ATA (Air Transport Association) for technical manuals and geophysical data visualization.
How to open a CGM file
CGM files are primarily viewed using specialized CAD and engineering software such as Cortona2D Viewer, PTC Arbortext IsoView, or Siemens NX. General image viewers like IrfanView (with plugins) and XnView can display them on Windows. While web browsers do not support CGM natively, 'WebCGM' profiles exist for specialized implementations. Conversion to SVG is recommended for modern web usage.
CGM Technical Info
- Full Name
- Computer Graphics Metafile
- Developed By
- ISO/IEC JTC 1/SC 24
- Initial Release
- 1987
- MIME Type
- image/cgm
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