The easiest way to convert a collection of SVG files to a raster format is to use a NodeJS application called svg2png. The utility program produces a high-quality, fully resized output file.
From the terminal, install svg2png:
npm install -g svg2png
Run svg2png from the command line and adjust the parameters based on the instructions. For example, you can batch-convert a directory full of SVG files to properly-sized PNGs (64 pixels-wide, in this case) with a single command line, as follow:
for f in *.svg; do svg2png "$f" -o "${f%.*}.png" -w 64; done;
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