I also use Caesium Image Compressor on my ROMs and Themes folder to reduce their size and improve the RG35XX's responsiveness. Source: about 1 year ago

If you want further compression you could check out Caesium Image Compressor which is free (and I'm not affiliated with it incidentally, I just like it). Source: about 1 year ago

Try an image compression tool, this one is free and open source: https://saerasoft.com/caesium/. Source: over 1 year ago

Caesium Image Compressor can do the job and it is easy to use. There is also imagemagick which is basically the swiss-knife for image editing, but based on you having looked for websites first, I assume you don't look for a commandline tool (imagemagick is a commandline tool). Source: about 2 years ago

I can recommend Caesium , a utility (Windows, MAC version in Alpha test) to remove all EXIF, metadata etc which will reduce your JPG in size quite a lot without using higher JPG-compression (lower quality). Source: almost 3 years ago

You may checkout todesktop.com if you want to offload these tasks. Source: about 1 year ago

We're looking to create something like todesktop.com with some additions. Source: over 2 years ago

Write a Rails app and wrap it with https://todesktop.com. Source: over 2 years ago

I also came across flask-desktop, and todesktop.com which claim to be able to convert a flask app into a desktop app. I'm not sure how an https request would work there, but I'm considering looking into that as well. Source: about 3 years ago