Here are five ways to compress images without losing any of the quality, or at least not obvious visible quality.

If you have a MacBook with a small drive, you may want to save space by shrinking images. It will make your website faster, emails send quicker, and more images can be carried on a thumbdrive. Photos should be optimized and this means shrinking the file size and perhaps the dimensions in pixels too. The images produced by the latest devices can be huge, both in terms of pixel dimensions and also file size. If you carry images on a thumb drive, email them, share them online or post them to your website, you should avoid doing so with the originals from your digital camera or phone.

Whether you just want to save space on the Mac’s drive or optimize the images on your website for speed, here are five utilities and web services to compress photos and shrink file sizes.