Some possible improvements suggested by a user

[jakemanger]

Metadata editing, like Exif data editing, ID3 Tags or PDF authors, Support OCR? Corrupted File Repairs, File encryption (with passwords of course)? Those things would be pretty cool ! 😎

I may not be able to do corrupted file repair but will work on support for the others

[jakemanger]

It absolutely should include a quick estimate on the file size when selecting the type from the dropdown. I want to understand that my 200kb JPG can compress to xxKB if I use WEBP or xyKB if I use AVIF for example.
There is no output data. Once the image is converted it does not show what the compression was, it only shows the input file size. It should show what the original file size was, what the converted file size is and even a (xx% percentage saved/reduced)
Please add the ability to drag and drop the output file from within the output box. (Instead of having to click save > select a destination and then find it) being able to drag the file converted/compressed file from the preview would be great as the current UI feels cumbersome.
Give users the image quality/compression toggles on the main conversion screen so you can adjust on the fly instead of having to click on the settings icon, as well as show the file output size as the toggles are adjusted.