HotConvertDrop your files here
or click to select
Why convert PNM to CGM?
Fast
Your file is converted in under 30 seconds in our cloud.
Secure
Files are automatically deleted after 1 hour.
Quality preserved
Maximum quality preserved during conversion.
About the PNM format
PNM — Portable Anymap
PNM is a generic designation for any of the Netpbm formats (PBM, PGM, PPM). Many tools accept or produce PNM files that can be any of these three types, auto-detected by the header. It serves as a universal plain-image interchange format.
Common uses
- Generic Netpbm image interchange
- Flexible input for image processing tools
- Command-line and scripting image workflows
- Converting images when type may vary
About the CGM format
CGM — Computer Graphics Metafile
CGM is an international ISO standard for storing and exchanging 2D vector graphics. It is widely used in technical documentation, engineering, and aviation/aerospace industries where a vendor-neutral vector format is required by standards bodies.
Common uses
- Aerospace and defense technical illustrations
- ATA 100 and S1000D aircraft documentation
- ISO/IEC standard compliant engineering drawings
- Converting legacy technical documentation graphics
Related conversions
Other conversions available for PNM and CGM files
Frequently asked questions
Is the conversion free?
Yes, basic conversion is completely free. For large volumes, check out our paid plans.
What is the maximum file size?
Free accounts can convert files up to 25 MB. Pro accounts up to 100 MB.
How long are my files kept?
Files are automatically deleted after 1 hour on the free plan, 24 hours on Pro.
What formats are supported?
We support over 200 source and target formats. See our complete formats page.