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: over 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

Many good alternative listed already. But I have quite liked FileLight which is cross platform https://apps.kde.org/filelight/ Likely not as fast as WizTree though. - Source: Hacker News / 16 days ago

You’ll need to boot into Desktop Mode to drill deeper regarding what’s installed on your SD card or internal storage. In Desktop Mode, you can navigate around using the built-in file explorer, Dolphin. You can also download and install Filelight from the Discover app store, if you want more of a visual aid while sifting through your files and directories. Source: about 1 year ago

I would open the Discover store in Desktop mode and download Filelight, which will help visualize the used space on your drive. It might help illuminate what’s taking up so much space, pun intended. Source: about 1 year ago

Use KDE Filelight, it's actively maintained unlike SpaceMonger. Source: about 1 year ago

Run this before assuming that it's some random program https://apps.kde.org/filelight/. Source: over 1 year ago