How can I compress image PNG And JPG images?

Question

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

score 13 · Accepted Answer · edited Nov 10 '22 at 07:18

13

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

How to reduce quality of photos:

Put all of them in one directory.
Make a backup of the directory.
Open terminal in the folder (typically by pressing F4).
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 -y imagemagick.

Enjoy :)

edited Nov 10 '22 at 07:18

Nam G VU

answered Sep 19 '17 at 04:22

Sebastian

3

The install command is now, sudo apt-get install imagemagick – Kolappan N Jun 06 '20 at 15:45
1

Better compressed result for me is with optipng ref – Nam G VU Nov 10 '22 at 08:06
For png's this article has some discussion of all the various tools. According to the author, the place to start would be zopfli (in Ubuntu 20.04 repo). – Diagon Jul 05 '23 at 05:53

1 Answers1