How to convert multiple XCF files to PNG?

One-liner from bash:

for i in *.xcf; do xcf2png -f $i -o $i.png; done

You can use GIMP Image editor and use Export to tool. Use Ctrl-Shift-E as shortcut.
Or you could use convert from imagemagick:

convert filename.xcf filename.png

You could also use xcftools (sudo apt-get install xcftools), which has a utility called xcf2png that does this job perfectly.

xcf2png image.xcf -o image.png

same of @k0pernikus, but remove xcf extension from output filename

for i in *.xcf; do xcf2png -f $i -o "${i%.*}.png"; done

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