Has anyone noticed a difference in email open rate or click-through rate if the email contains large images so that the total email is 500 KB, 1 MB, even 1.5 MB?
The reason is that we could work faster if we could upload to Klaviyo our full images and not have to worry about tweaking their dimensions, quality and format to get them as small as possible (as we do on our website).
For example one image might be a PNG that is 417 KB but if we optimized it we could make it a JPG at 84 KB.
Is that worth the effort?
Best answer by david.to
Elaborating further on what
However, you may still be seeing less than desirable open rates for emails that have an overall size greater than 102KB due to clipping.
Although images are not counted towards your overall email size when sent, should your email size be greater than 102KB, it would impact the open rates of your emails from your Gmail users. This is because when an email is clipped, the tracking pixel Klaviyo uses; which is housed at the bottom of your emails is omitted and therefore not tracking these “opens”.
Through a combination of having larger images causing the content of your email to be delayed in loading and the email being clipped due to surpassing this 102KB limit may lead to less than anticipated open and click rates. For best practices to alleviate clipping in your emails, you can reference our Why Is My Email Being Clipped? article.