Image Test
See the Fastly documentation and the source code for settings and options.
Obviously, you can tweak your images with the Fastly options via the direct URL to preview and verify your syntax, e.g.: https://skeleton.electroworkshop.com/wp-content/uploads/2021/09/Screen-Shot-2021-09-14-at-12.58.27-PM-1-400×300-c-default@1x.png?blur=2
<img src="https://skeleton.electroworkshop.com/wp-content/uploads/2021/09/Screen-Shot-2021-09-14-at-12.58.27-PM-1.png?format=jpg" />
Original image uploaded: pretzel.jpg | 1245w x 537h | 486kb
No width/No height.
<img src="https://skeleton.electroworkshop.com/wp-content/uploads/2021/09/Screen-Shot-2021-09-14-at-12.58.27-PM-1.png" width="1245" height="537"/>
Auto-converted to .webp: 111kb.
Out of the box, this is a 77% smaller file.
You did nothing except have JDJ turn Fastly on.
Image via css
(/wp-content/uploads/2021/09/Screen-Shot-2021-09-14-at-12.58.27-PM-1.png?quality=20)
<img src="{{post.thumbnail.src}}?width=800" width="800" height="345" />
<img src="{{post.thumbnail.src}}?optimize=high&width=800" width="800" height="345" loading="lazy" />
<img src="{{post.thumbnail.src}}optimize=high&width=800,smart" width="800" height="345" loading="lazy" />
<img src="{{post.thumbnail.src}}?orient=2&width=400" width="400" height="173" loading="lazy" />
"Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur? Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur? Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?"
<img src="{{post.thumbnail.src}}?quality=50" width="1245" height="537" loading="lazy"/>
<img src="{{post.thumbnail.src}}?trim=50,100,50,100" width="1145" height="437" loading="lazy" />
<img src="{{post.thumbnail.src}}?width=300&height=129" width="300" height="129" loading="lazy" />
<img src="{{post.thumbnail.src}}?width=500&height=216&blur=4" width="500" height="216" loading="lazy" />
<img src="{{post.thumbnail.src}}?width=640&height=276" width="640" height="276" loading="lazy" />
<img src="{{post.thumbnail.src}}?width=120&height=52" width="120" height="52" loading="lazy" />
<img src="{{post.thumbnail.src}}?crop=1000,200" width="1000" height="200" loading="lazy" />
<img src="{{post.thumbnail.src}}?crop=16:9" width="1245" height="537" loading="lazy" />
<img src="{{post.thumbnail.src}}?crop=5:4" width="617" height="537" loading="lazy" />
<img src="{{post.thumbnail.src}}?crop=2:1" width="1245" height="537" loading="lazy" />
<img src="{{post.thumbnail.src}}?crop=1:2" width="269" height="537" loading="lazy" />
<img src="{{post.thumbnail.src}}?crop=1000,200,x200,y20" width="1000" height="200" loading="lazy" />
<img src="{{post.thumbnail.src}}?pad=100,200,100,200?&bg-color=eee" width="845" height="337" loading="lazy" />
<img src="{{post.thumbnail.src}}?dpr=2&width=400" width="400" loading="lazy" />
<img src="{{post.thumbnail.src}}?width=300&height=129&sharpen=a5,r2,t0" width="300" height="129" loading="lazy" />
<img src="{{post.thumbnail.src}}?width=500&canvas=620,640&bg-color=eee" width="500" loading="lazy" />
<img src="{{post.thumbnail.src}}?width=200&height=200&fit=crop" width="200" height="200" loading="lazy" />
<img src="{{post.thumbnail.src}}?width=200&height=200&fit=cover" width="200" height="200" loading="lazy" />
<img src="/wp-content/themes/electro/img/coal-gif.gif?frame=1&quality=20" width="477" height="294" loading="lazy" />
original gif: 2.2mb
<video width="477" height="294" playsinline autoplay muted loop>
<source src="/wp-content/themes/electro/img/coal-gif.gif?format=mp4" type="video/mp4" />
</video>
<picture>
<source media="(max-width: 799px)" srcset="https://skeleton.electroworkshop.com/wp-content/uploads/2021/09/Screen-Shot-2021-09-14-at-12.58.27-PM-1.png?width=350&height=175&brightness=50">
<source media="(min-width: 800px)" srcset="https://skeleton.electroworkshop.com/wp-content/uploads/2021/09/Screen-Shot-2021-09-14-at-12.58.27-PM-1.png?width=1100&height=520&orient=2">
<img src="http://placekitten.com/200/300" alt="" />
</picture>
<img src="https://skeleton.electroworkshop.com/wp-content/uploads/2021/09/Screen-Shot-2021-09-14-at-12.58.27-PM-1.png?width=200&height=200" alt=""
srcset="https://skeleton.electroworkshop.com/wp-content/uploads/2021/09/Screen-Shot-2021-09-14-at-12.58.27-PM-1.png?width=800&brightness=50 800w,
https://skeleton.electroworkshop.com/wp-content/uploads/2021/09/Screen-Shot-2021-09-14-at-12.58.27-PM-1.png?width=900&brightness=-50 1100w"
sizes="(min-width: 1100px) 100vw, 50vw">
Ligher saturation: smaller
Dark saturation: larger