SGI to PNM Converter
Convert your sgi files to pnm online & free
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How to convert SGI to PNM
Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
Choose "to pnm"
Choose pnm or any other format you need as a result (more than 200 formats supported)
Download your pnm
Let the file convert and you can download your pnm file right afterwards