One of the biggest mistakes made by new web developers concerns resizing images. When you insert an image into an article, you can resize it, but this only changes the display size of the image. The actual file size remains the same. For example, let's say your original image is 3200 x 2400 pixels which results in a file size of 3MB. This would be far too big to display in an article, so when you insert it, you might resize the dimensions to 320 x 240 pixels. This will look better, but the file size of the image remains at 3MB and as such, it takes a very long time to download.
It is therefore important to resize your images before you insert them into your articles and I demonstrate how to do this in our Beginner Plus Joomla tutorials, using software. However it is more convenient to do this within Joomla. One tool that can help is a plugin by JCE.
The Joomla Content Editor is a free HTML editor that is a popular replacement for the standard editor supplied with Joomla. It also has an optional plugin that includes the ability to resize images as you upload them. This plugin is available via subscription. This is a handy tool for those who don't have or are uncomfortable using third party software and those who want to do everything within Joomla.