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What is the best size and format for images

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The best practice for websites is to ensure you have images that are suitable for viewing on both website and mobile. Not having device-optimized imagery can not only irritate your website users, but also harm your search engine ranking.

Conversion Wax content enables you to upload images for desktop, tablet and mobile, but, we’ve also been smarter than that…

When you use content created on our platform, Conversion Wax will automatically select a size and format that best suits your user demographic.
This includes converting images to SVC files - this is google’s preferred image format - as well as automatically re-sizing images depending on device type.

If you want to optimize your images ahead of adding them to Conversion Wax, then take a look at our handy guide below to help you:

Website image type Desktop image dimensions Mobile image Aspect ratio
Background image 2560px x 1400px 360px x 640px 16:9
Hero image 1280px x 720px 360px x 200px 16:9
Website banner 1200px x 400px 360px x 120px 3:1
Blog image 1200px x 800px 360px x 240px 3:2
Lightbox image 1920px x 1080px 360px x 640px 16:9
Thumbnail 300px x 300px 90px x 90px 1:1
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