Now a days JavaScripts are essential part of an interactive websites or good looking blogs. But the size of the JavaScript create problem at the time of page loading, It makes your website/blog very bulky and takes so much time to get loaded. Page loading is very important for getting a quality traffic, that’s why always compress the JavaScripts of your webpage.
You can analyse your webpage online by using Pingdom where you can see the size of your JavaScript which needs to be compressed. There are so many Online Compressors available for free, you need to put the code over there and the out put will be the compressed JavaScript. It may reduce the size by 60-70%.
Some of the Online JavaScript compressors are,
Use any of the above compressor, and experience the difference in the page load time on Pingdom.