How can I decrease the file size of an image without compromisng it´s quality?

My background image in my website takes a few seconds to appear when opening the site, and that kind of leaves a negative first impression to visitors.

So, how can I make the image lighter (in file size) so that when opening the website it appears faster - and not compromise the quality of the image?

 

Found via Google Search:

http://www.designerwiz.com/mf.htm?h...m/generator/jpeg_image_optimizer_cruncher.htm

 

thanks but, no free services?

 

Many free image browsers (XnView, Irfan, FastStone) offer the ability to re-code your JPG images and save them with higher compression algorithm.
But JPG's compression is a lossy one, so there will ALWAYS be some quality loss. The question is if it is noticeable - you will have to try several different compression factor values and decide which one gives you the best quality/compression ratio.

 

If you want I will run it through ImageReady optimize it for free, it only takes a few minutes if you have the software.

If you interested send me a pm.

 

I rely heavily on IrFanView, it is a great utility for doing just what you ask for.