Convert CGM to BMP
Convert CGM to BMP online: the technical illustration rendered as a crisp page, saved as an uncompressed BMP bitmap. 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 BMP output options, then start the conversion.
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Download BMP files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert CGM to BMP?
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.
BMP stores every pixel uncompressed, so the image is exact and simple to read by any software that handles Windows bitmaps.
Frequently Asked Questions
How do I convert CGM to BMP?
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 an uncompressed BMP bitmap, ready to download.
Do the text labels in a CGM illustration show up in the BMP?
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 BMP?
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 BMP pages?
Each page is rendered at 144 dpi and saved as its own BMP image, named page-1, page-2 and so on, and they download together as one ZIP. A single page downloads as one BMP file.
What kind of BMP does the CGM converter create?
A standard Windows bitmap with every pixel stored uncompressed, so the image is an exact copy of the rendered result.
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.