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I need an image compression for my Linux machine with the following features:

  • Support .png and .jp(e)g files
  • Bulk functionality to compress a lot of images at once
  • GUI (optional)
  • Free
  • Linux

At the moment I use Trimage image compressor, but I am not satisfied with the results. The loss is no more than 5-10% each time.

  • 1
    So how much loss are you expecting? – aman207 Mar 13 '15 at 15:08
  • It always depends of the original size and type. At office, we have an app for Windows which has compressed from 20-70%. – Tasos Mar 13 '15 at 15:22
  • Related – aman207 Mar 13 '15 at 15:26
  • I found it but be a command line tool with no gui interface..I prefer with a GUI – Tasos Mar 13 '15 at 15:39
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    Then why not use the ImageMagick command-line tools? I have them in some places for bulk-processing. As easy as mogrify -quality 70 *.jpg, for example. – Izzy Mar 14 '15 at 0:09
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ImageMagick should meet your requirements, as your requirements mention a GUI is optional. I'm using that for "batch compression" all the time, which is as easy as

mogrify -quality 70 *.jpg

(this example compressing all JPEG images in the current working directory to 70%).

  • Support .png and .jp(e)g files: Yes, and many more formats.
  • Bulk functionality to compress a lot of images at once: Yes, as pointed out :)
  • Free: Yes, open-source.
  • Linux: Yes, and in the repos of all major distributions
  • GUI: Oh: Yes, infact there is – by the command display

ImageMagick GUI
display offers a GUI to ImageMagick (source: ArchLinux Wiki; click image for larger variant)

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