There are several file formats that you can use in Loopify.
The Files app supports the following:
Note: Not all email clients support the SVG format.
The best formats for logos is PNG and JPG for general images.
The Email app and the Pages app will insert a 2x resolution image for high-resolution displays when the image is inserted into the newsletter or page. This means if your email template is 640 px wide, the images should be at least 1280px wide.
In general, the bigger the image size - the better. Loopify will always try to insert the correct size.
The maximum image size that can be uploaded in Loopify is 30MB.
This is mostly related to the Print app. The minimum image quality required for not having low-quality printed images is 300 points per inch. Bear in mind that a larger image-container may also stretch an image. Our print minimum is set to 300 PPI to make sure that the images do not look "bad on paper".