Tools To Optimize Your Images Online

A List Of Best Online Image Optimizer

High quality images used on websites which are not optimized can take a lot of time for a simple page to load and can consume a lot of bandwidth. Unless all your users are using high speed internet, it is very important for you to optimize every possible image on your website. Let me explain you why optimizing images on your websites is important.

Let us assume you are running an online store where the size of home page of your website is 1 MB out of which 500 KB is the total size of all the images on that page. Let’s say you get 100 visitors on your website every day which means that you are spending close to 50 MB of server bandwidth only on images. This is where image optimization comes into picture. Image optimization helps you to reduce the size of the image without messing with the quality.

Optimizing images can save you on your server bandwidth and space, it will also make your website load faster and provide better user experience. Hence it is extremely important for you to keep your image size as low as possible.

Whenever possible make sure that the size of an image on your website should always be under 100 KB or less.

Let’s try to see the difference between an optimized and an normal image.




Here the first image is a normal image and the second image is an optimized version of first image. The size of the first image is 156 KB whereas the size of the second image is 110 KB, so the total saving is of 46 KB and there is almost no visible change in the quality of the image.

I have compiled a list of best free online image optimizer for your website, which are extremely fast and user friendly. People who don’t know Photoshop can still use these online image optimizer for their website.

Before you start using these online image optimizer tools for your website I would suggest you to check your site load time, you can check it on Pingdom. You can then compare the results after image optimization.

To optimize your images online, you can use any of the below tools



JPEGMINI is one of the best online image optimizer which works like a charm for JPEG format images. It can reduces the size of your photo’s by up to 5x without messing with the quality of the image. The only problem with this site is, you can’t upload more than one image at a time as a free user.


2. Kraken


Kraken is a web based image optimizer, which supports multiple image formats for optimization. It has a very clean and easy to use interface.


3. PunyPNG 


PUNYPNG is an online image optimizer which can optimize multiple image formats like PNG, JPEG and GIF. The best part of this website is that you can upload multiple images. (The size of your individual image file needs to below 150 KB and you can upload only up to 15 files ) and once the images are optimized you can download all the new files easily in a zip format without any need for registration.


4. is an online image optimizer tool powered by Yahoo Developer Network. It supports multiple image formats. Has a very clean user interface, which provides you with the details of the optimization in a tabular format with the information like no. of KB’s saved and its percentage.

According to their website they use the following algorithm’s for image optimization.

  1. ImageMagick: to identify the image type and to convert GIF files to PNG files.
  2. pngcrush: to strip unneeded chunks from PNGs. We are also experimenting with other PNG reduction tools such as pngoutoptipngpngrewrite. Hopefully these tools will provide improved optimization of PNG files.
  3. jpegtran: to strip all metadata from JPEGs (currently disabled) and try progressive JPEGs.
  4. gifsicle: to optimize GIF animations by stripping repeating pixels in different frames. 

More detailed information about the same can be found here : FAQ


5. TinyPNG


TinyPNG is an online image optimizer dedicated only for PNG files. You can upload up to 20 images at one go, but the total size all the uploaded images needs to be below 3 MB.

 Hope you liked this post and benefit from it..cheers!