CGM to PNG Converter

Convert CGM to PNG online, for free.



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Keep original size
Choose how to set the output size: keep the original dimensions, enter a width or height while keeping the aspect ratio, or customize both dimensions.
Lossy Compression
Choose how much to compress the PNG. "Lossy" gives the smallest files at the cost of image quality; "Auto" picks a level for you.
Lower values give better compression (at the cost of image quality)
Makes the color you pick transparent in the PNG output. Use the color picker or enter a hex value (e.g. #FFFFFF).
Sets the pixels per inch (0-1000) used when converting to a raster image. Higher DPI gives a sharper result but a larger file. 72-150 is fine for on-screen use, and 300 is the usual choice for printing.
Choose a color using the color picker or enter a hex color value. (eg. #FFFFFF)
Sets how opaque the background is, from 0 (fully transparent) to 1 (fully opaque).


How to Convert CGM to PNG?

  1. Click the “Choose Files” button to select your CGM files.
  2. Click the “Convert to PNG” button to start the conversion.
  3. When the status change to “Done” click the “Download PNG” button

Easy to Use

Simply upload your CGM files and click the convert button. You can also batch convert CGM to PNG format.

Best Quality

We use both open source and custom software to make sure our conversions are of the highest quality. In most cases, you can fine-tune conversion parameters using “Advanced Settings” (optional, look for the icon).

Free & Secure

Our CGM to PNG Converter is free and works on any web browser. We guarantee file security and privacy. Files are protected with 256-bit SSL encryption and automatically deleted after 8 hours.


Computer Graphics Metafile (CGM) is an international standard for storing vector graphics, raster images, and text in a single device-independent file. Standardised as ISO/IEC 8632, CGM was designed so that technical drawings would look identical on any system, and it remains heavily used in aerospace, defence, and engineering documentation — the S1000D and ATA specifications for technical manuals both rely on it.

 

How to open a CGM file?

CGM is not supported by everyday image viewers. On Windows, IrfanView and XnView MP display many CGM files.

 

For full fidelity, professional tools such as CorelDRAW, Adobe Illustrator, and dedicated CGM viewers from technical publishing vendors do a better job with complex engineering drawings. LibreOffice Draw imports simpler CGM files. Converting to PDF or SVG is usually the easiest way to share a drawing with colleagues.

 

Developed by: ISO/IEC and ANSI

Initial Release: 1987


Portable Network Graphics (PNG) is a raster-based file type that compresses images for portability. PNG images can have RGB or RGBA colors and support transparency, which makes them perfect for use in icons, or graphic designs. PNG also supports animations with better transparency (try our GIF to APNG). The benefits of using PNG are Plus, PNG is an open format that uses lossless compression. 

How to open a PNG file?

Generally, PNG files will open in your operating system’s default image viewer. PNG files are also easily viewable on all web browsers. If you are having trouble opening PNG files, use our PNG to JPG, PNG to WebP, or PNG to BMP converters.


Alternative programs such as GIMP or Adobe Photoshop are useful for opening and editing PNG files. PNG files are a bit larger than other file types, so exercise caution when adding them to a web page. One interesting feature of PNG files is the ability to create transparency in the image, particularly a transparent background. 


Developed by: PNG Development Group

Initial Release: 1 October 1996

Useful links: 

LifeWire article on PNGs

Wiki article on PNGs

Related PNG Tools: 

Use our Color Picker to pick colors from images

FreeConvert.com can convert your CGM files to these other formats:

FreeConvert.com can convert your files to these related formats:


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At FreeConvert, we go beyond just converting files—we protect them. Our robust security framework ensures that your data is always safe, whether you're converting an image, video, or document. With advanced encryption, secure data centers, and vigilant monitoring, we've covered every aspect of your data's safety.

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