Image files should always be optimized before you upload them to your web site or blog.
REASONS TO OPTIMIZE YOUR IMAGES
- The files upload quicker
- The files download quicker (pages the images are on load faster)
- You can store more files because they take up less space
Here is one trick to easily resize your images without doing a lot of work:
USE A FREE ONLINE IMAGE SITE
After you’ve uploaded your photo(s), Flickr (and probably Picasa) automatically offers several “thumbnail” versions of the original size:
e.g. Square (75 x 75) Thumbnail (100 x 75) Small (240 x 180) Medium 500 (500 x 375) Medium 640 (640 x 480) Large (1024 x 768)
You could let these services “do the work for you,” in seconds.