imagezap
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imagazap
  • automates the process of finding the right combination of size and compression
  • ensures that your images are as small as possible without losing any quality.
  • allows your page to load faster
  • helps you to implement Google's page speed analysis recommendations
Formats
imagezap will process jpg and png images. It will not process gifs and these will never provide optimised file size. Webp is not supported but it is unlikely that any image compressed with webp could be improved.
What exactly does it do ?
imagezap collects image information from the specified page at 3 different browser widths: 1920px, 1200px, and 992px. These are the widths used by W3.CSS, the responsive page framework. It then creates 3 sets of images which are optimised by scaling and compression where possible. A free report detailing the 3 image sets is created and displayed.
Will it work with images hosted on a CDN or an external server ?
imagezap will process any image that is supplied to the browser as an image file with a resource type of "image", for example a source defined as "https://acme.com/hmg-prod.s3.amazonaws.com/images/coronation-robert-preston-1-1566122585.jpg?crop=0.493xw:0.493xh;0.248xw,0.00814xh&resize=480:*"
How much compression is done ?
imagezap performs only lossless compression using linux tools. Greater reductions using other tools could be achieved by lowering quality.
How do I use imagezap ?
If the report indicates significant file size reduction is possible you can pay a small fee to download the optimised image sets. You then upload these to your site using ftp. The zipped archive contains the same folder structure as your site.
How do I use the 3 image sets ?
Usually to get the best saving in file size and the fastest page load, different images are served at different browser widths. This can be done most easily using the picture HTML5 element. It can also be done using either server side or javascript code.
How much does imagezap cost to use ?
Generating a report is free. You pay a small fee which, calculated on the total size of the image files, to download the image sets. Payment is via PayPal in USD, GBP or EUR according to your location. The minimum charge is $1.
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