Hello there ,
I was using the picture compressor tool you mentioned on your page here: wannabe.contropa.com/date/2015/11/
While tinypng.com/ does a good job, it only allows you to compress pictures that are up to 20 MB.
After some exploring I found this other tool and I wanted to suggest you show it along that one :
https://www.websiteplanet.com/webtools/imagecompressor/,
This tools allows you to compress pictures that are up to 50 MB in size both in jpeg and in png format!
In hope I helped back,
Lily