How can I compress image PNG And JPG images? [duplicate]

How can I compress PNG and JPG images by more than 50%?

1 Answer

There is a handy tool called mogrify that enables to do all sort of batch operations with images.

How to reduce quality of photos:

1. Put all of them in one directory.
2. Make a backup of the directory.
3. Open terminal in the folder (typically by pressing F4).
4. Run command mogrify -quality 60% * (this will reduce quality of all .jpg, .jpeg, .png images listed in the folder)

Be aware that image files will be replaced by reduced one. Make a backup first just in case you reduced a quality too much.

You can look up more functionality that mogrify provide in man mogrify.

To install mogrify, try sudo apt-get install mogrify.

Enjoy :)