Hi Pilou,

i was talking about "high-quality"... So please try again with 100% instead of 90%.

When i use 100%, depending on the software i use, i get between 300+K and 500+K.

Regards
Stefan

for your image at 100% : 292.167 ;)

Cool, that sounds good.

O.k. another test with Google's Zopfli, in case people
don't like jpeg...

Same image with Photoshop as .png = 736.661 Byte
then pngcrush = 660.358 Byte
and pngcrushed image used with Zopfli = 631.517 Byte

Source Code: https://github.com/google/zopfli

Regards
Stefan

Hi Pilou,

i wonder if you or anybody else can open also
my attachment without any problems. I used also
Google's Zopfli to compress the file instead
of .zip. Maybe i use it too in the future for
attachments if everybody can open it.

Zip file = 909.779 Byte
Zopfli = 895.999 Byte

O.k. Pilou, i checked the --help entry and Guetzli defaults to 95%...

With 100% it would be 476.217 Byte
and with 90%, like you did, it would be 84.770 Byte.

I'm curious now what you would have with 95%?

You must have a very good encoder for Windows! :-)

P.S. just found ImageOptim for Mac, wich contains
Zopfli too. https://imageoptim.com/mac

Regards
Stefan

With my old one i have 122.016 at 95 %

If you speak about BatWing attachment no problem to uncompress with 7Zip! :)

Thanks for the info Pilou, much appreciated!

Regards
Stefan