OpenWrt Logo 2020
Conversion to other formats
SVG
There is a nice short how-to for conversion of PDF into SVG using Inkscape and some information about extracting part of a PDF as well.
PNG and favicons
If you would like to create ICO/PNG favicons from SVG image as suggested in painfully obsessive cheat sheet to favicon sizes/types, you can either read Helpful tools section or use information available in the How to convert a square SVG to all-size ICO? and then check the result at Favicon Generator.