In many case, image compression is automatic. Apple’s Mail app gives you choice when you share a photo. Most photo apps have an export option which also shrinks images. Here’s one that’s free and it works online.
Of PNGs & JPGs
Adobe seems to have a lock on the best file compression methods and that’s what we use here on Mac360; Photoshop to Fireworks. The idea is to make an image look the same as the original but 10-percent or 20-percent of the physical size in bytes.
Enter Compress PNG/JPG, a website which lets you compress images and photos online. Every image or photo that is compressed also has a reduction in quality, so the idea of compression technology is to reduce the file size but not reduce quality– at least, quality you can see.
Can you tell which image was the original at 92kb and which is the compressed version at 22kb?
Image and photo compression means a loss of quality, but the key to compression tools is to reduce the overall file size while maintaining as much of the original as possible. Many tools can reduce an image 80-percent to 90-percent without a perceivable loss in visual quality.
In the .PNG image above, the top photo was of the original 92-kb file, while the bottom was the compressed 22kb file. I had trouble determining which was which, too.
Compress PNG/JPG handles both PNG and JPG files and all you have to do is drag the file from the Mac’s Finder to the website.
Not shabby, right?
Compress PNG/JPG limits files to 50MB each, and a limit of 40 images total, but you’re likely to have bandwidth issues long before then. File compression is a norm for online images, but also a good way to save space on your Mac.