Convert CGM to PNG
Convert CGM to PNG online: the technical illustration rendered as a crisp page, saved as a lossless PNG. Free, no sign-up.
Drop your CGM files here
Up to 50MB per file.
Conversion Settings
Files are encrypted and auto-deleted after conversion
How to Convert
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Upload your CGM files
Drag and drop or select CGM files from your device. You can upload multiple files at once.
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Configure Output
Choose any available PNG output options, then start the conversion.
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Download PNG files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert CGM to PNG?
CGM (Computer Graphics Metafile) is the ISO vector graphics standard used for technical illustrations in aerospace, defence and engineering manuals. LibreOffice draws the metafile's lines, filled shapes and text onto a page, which is rendered at 144 dpi so the illustration stays crisp.
PNG keeps every pixel exactly as rendered, so text, thin lines and flat colours stay crisp, and transparency is preserved.
Frequently Asked Questions
How do I convert CGM to PNG?
Drop your CGM file above and press Convert. Our servers open the CGM with LibreOffice, export it as a PDF and render each page of that PDF as the image you chose. The result is saved as a lossless PNG, ready to download.
Do the text labels in a CGM illustration show up in the PNG?
Yes. LibreOffice imports the metafile's text along with its lines and filled shapes, so callouts and labels are drawn in place.
Are the fills and colours of a CGM illustration kept in the PNG?
LibreOffice draws the filled areas, line colours and text as the metafile defines them, and the page is rendered at 144 dpi in full colour.
What happens when a CGM file fills several PNG pages?
Each page is rendered at 144 dpi and saved as its own PNG image, named page-1, page-2 and so on, and they download together as one ZIP. A single page downloads as one PNG file.
Why is PNG a good fit for a CGM conversion?
PNG is lossless: the image keeps every rendered pixel with no compression artefacts, which keeps small text, table lines and drawings perfectly sharp.
Is my .cgm file kept private?
Your file is uploaded over an encrypted connection, converted on our servers and deleted automatically within 24 hours. We never read, share or keep your files, and no account is needed.