CMX is legacy and read-only here
CMX is an older vector format. It can usually be opened and converted from, but it's long obsolete, so there's no modern encoder to create new CMX files.
Looking to convert AI to CMX? Here's the honest answer — and what works instead.
Turn your file into a share-worthy AI Effect — one tap, no prompts.
AI is Adobe Illustrator’s native vector format for logos, icons and illustrations that scale to any size.
AI files open in Adobe Illustrator and many vector editors.
Not here — CMX is a legacy format with no modern encoder. We can often read CMX as a source, but for output use a current format like SVG, PDF or EPS.
AI converts to SVG, PDF or EPS — free, no sign-up, no watermark.