Convert CGM to HEIC
Convert CGM to HEIC online: the technical illustration rendered as a crisp page, saved as a HEIC image. 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 HEIC output options, then start the conversion.
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Download HEIC files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert CGM to HEIC?
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.
HEIC uses High Efficiency Image Coding, the format iPhones and iPads save photos in, so the image is compact while staying sharp.
Frequently Asked Questions
How do I convert CGM to HEIC?
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 HEIC image, ready to download.
Do the text labels in a CGM illustration show up in the HEIC?
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 HEIC?
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 HEIC pages?
Each page is rendered at 144 dpi and saved as its own HEIC image, named page-1, page-2 and so on, and they download together as one ZIP. A single page downloads as one HEIC file.
How compact is the HEIC made from a CGM file?
HEIC uses High Efficiency Image Coding, which typically needs about half the space of a JPG of similar quality, so even detailed pages stay small.
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.