In this tutorial we will learn,how to install and optimize the png file by using optipng. Optimizing the png format file is very important, in terms of decreasing the website loading page time. If your website has a lots of png file,it may take time to load which also results in decreasing the webpage opening speed.
OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. This program also converts external formats (BMP, GIF, PNM and TIFF) to optimized PNG, and performs PNG integrity checks and corrections. (Reference from Optipng project link)
How to install optipng in CentOS/Red Hat/fedora
To install optipng in Red Hat based operating system,first we will install the EPEL repo.To learn about what is EPEL repo and how to install.Read our this post
Installation command syntax is: yum install optipng
In CentOS 5.x /Red Hat 5.x / Fedora
yum install wget dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm rpm -ivh epel-release-5-4.noarch.rpm yum install optipng
In CentOS 6.x and Red Hat 6.x
yum install wget wget dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm rpm -ivh epel-release-5-4.noarch.rpm yum install optipng
In Fedora
yum install optipng
How to install optipng in Ubuntu/Debian/Linux Mint
To install optipng in Debian based operating system,use the given below command
sudo apt-get update sudo apt-get install optipng
Installing with optipng tarball
For installing from tarball,login with root or superuser
wget http://kaz.dl.sourceforge.net/project/optipng/OptiPNG/optipng-0.7.4/optipng-0.7.4.tar.gz tar -xvzf optipng-0.7.4.tar.gz cd optipng-0.7.4 ./configure && make && make install
For installing optipng in Windows
Download the Windows setup zipped file from the prject link http://optipng.sourceforge.net/
Unzip the downloaded file and then run optipng.exe file.
How to optimize PNG file with optipng
Optimizing the PNG file by using optipng is very easy.You have to use the command optipng along with some options and path of PNG file.
Before optimizing file ,check its size.And after running the command,again check the size.You will get PNG file with reduced size
Examples: Use any one example.
optipng pic.png (default speed) optipng -o5 pic.png (moderately slow) optipng -o7 pic.png (very slow) optipng -i1 -o7 -v -full -sim pic.png
For more help and flags, run the command optipng --help
