X3F (RAW) to SUN Converter
Convert your x3f files to sun online & free
Sigma Camera RAW Picture File
How to convert X3F to SUN
Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
Choose "to sun"
Choose sun or any other format you need as a result (more than 200 formats supported)
Download your sun
Let the file convert and you can download your sun file right afterwards