Good looking high resolution images can bring lot of success to any website because a good quality image is the best way to attract visitors.
But do you know, if you do not optimize images properly before uploading it to your WordPress site it will consume a lot of you server resource also slowdown your site to a great extent.
So, how to optimize images before uploading to your WordPress server. Though there are quite a few WordPress plugins to optimize images once it is uploaded on your WordPress site, I prefer to optimize images to maximum before uploading it to server.
Services to optimize Images
TinyPNG uses smart lossy compression techniques to reduce the file size of your PNG files. This is probably the best service to optimize images as far as PNG images are concerned.
By selectively decreasing the number of colors in the image, fewer bytes are required to store the data. The effect is nearly invisible but it makes a very large difference in file size
I find JPEG as the best format for images as file size is smaller as compired to PNG but you get almost the same quality as PNG.
JPEG-Optimizer is a free online tool for resizing and compressing your digital photos and optimize images for displaying on the web in forums or blogs, or for sending by email. Completely Free. No software to download.
Imageoptimizer is abother great free online service to optimize images, you can resize, compress and optimize your image files. Using the service is as easy as clicking of button! Optimized images are better! They are more suitable for web pages, email attachments, or even storage on your disk
Another service to optimize images before uploading it to your WordPress site. This free online image Web Resizer helps you optimize photos for web or email. Easy to use. Amazing results