How to Optimize JPG and PNG Images

If you need to optimize JPG and PNG images without losing their original quality so your website loads faster, you should know about these two utility software programs (available only for Linux operating systems):

• Jpegoptim - a utility designed to optimize / compress JPG files without losing quality.
• OptiPNG - a utility designed to optimize PNG images to reduce their file size without losing any information, including transparency.

Installing

 

How to install Jpegoptim

Below, we’ll walk you through how to install Jpegoptim on a Linux server running Ubuntu. In your terminal’s command line, run the following command: # apt-get install jpegoptim or $ sudo apt-get install jpegoptim

How to install OptiPNG

Below, we’ll walk you through how to install Jpegoptim on a Linux server running Ubuntu. In your terminal’s command line, run the following command: # apt-get install optipng or $ sudo apt-get install optipng

Using the tools

 

Using Jpegoptim

In your terminal’s command line, run the following command: For a single file: $ jpegoptim filename.jpeg $ jpegoptim filename.jpeg For multiple files in the same directory: $ jpegoptim *.JPG

Using OptiPNG

In your terminal’s command line, run the following command: For a single file: $ optipng filename.jpeg $ optipng filename.jpeg For multiple files in the same directory: $ optipng *.JPG

Important tips

• Always back up all your images before using any optimization program. If something unexpected happens, you’ll be able to quickly restore the original files.
• The utilities may change file permissions, so always make sure the image is available in your browser.