That's a short but interesting list. The 3rd suggestion (file compressor) is a part of something we pay for actually on cloudconvert: https://cloudconvert.com/

That's a short but interesting list. The 3rd suggestion (file compressor) is a part of something we pay for actually on cloudconvert: https://cloudconvert.com/png-to-ico https://cloudconvert.com/png-to-ico