Image requirements vary based on the template you're using. MailChimp templates are generally designed for a maximum width of 600 pixels and our mobile-specific templates are slightly narrower to account for smaller mobile screens. Some templates have multiple columns so each column is a portion of the overall template width. Take a look at the following sections for tips on working with images using the different template options: Email Designer, Classic, and Predesigned.

General image tips

  • Image files should be formatted as .jpg, .gif, or .png to ensure they'll display correctly across various email programs. PDF, PSD, and AI files cannot be used in the app since those file types are not consistently supported across web browsers.
  • Images used in a campaign need to be saved in a RGB format rather than a CMYK format. Some browsers and email programs can't display CMYK images because CMYK is typically used in print and not for the web.
  • Spaces or special characters shouldn't be used in the filename. Keep the names simple, yet easily identifiable.
  • Padding can influence how wide images should be, too. For example, if 10px of padding are applied around a header image, instead of the header image being 600px wide, you'll want to make it 580px wide- 10px on each side for padding.
  • It's best to avoid overly large images, both in file size and pixel dimensions. We recommend a maximum file size of 1MB for images. 72 dpi is generally sufficient for the web, but isn't required. We don't recommend uploading images that are significantly larger than your content area or template. For more specific size information, check out the following sections based on the type of template you're using.

Email Designer

When uploading an image to an image block in an Email Designer template, it's best to use a full sized image rather than shrinking the image down to match the dimensions of the block you're uploading to. This allows the image to remain in full resolution if it's moved to a wider block in the template. The editor will take care of constraining it for you based on the size of the block it's added to. As high pixel density displays are becoming more and more common this is a good way of ensuring that your images will remain sharp when viewed on a retina display.

Classic templates

These templates have little or no styling - they're just basic layouts where you add your content, images, and where you can pick your own colors or a theme. Many of these have areas that are designed specifically for images. If you hover over one of these image blocks, we'll tell you the recommended image size for that block. When using our classic templates, images can be added to any text block or location that isnt't specifically designed for images. If you'd like to add an image to one of these areas, take a look at the guide below to see the maximum width in pixels for each area.

  • Pre-header area: 560px
  • Body area for 1 column templates (no sidebar): 560px
  • Social bar and utility bar: 560px
  • Header: 600px
  • Body area (with sidebar): 350px
  • Sidebar: 160px
  • 2 column: 260px
  • 3 column: 160px
  • 4 column: 110px
  • Footer left: 370px
  • Footer right: 170px

Predesigned templates

Many of our Predesigned templates are also designed to be a maximum width of 600 pixels, with similar side column and main body width recommendations as the Classic Layouts.

  • Hover over an image block to see the recommended size constraints. If both a height and width are shown, it's best to upload an image that's the specific recommended size to ensure it displays as intended.
  • In editable regions where text can be inserted, edit the region and then double click on the image to get the current image size.
  • Templates are generally designed to expand with your content, but if your template doesn't look the way you want it, or adjacent content blocks are getting squished, try reducing the image dimensions.
  • Some templates have "(500 px)" as part of the template name. These are designed at a maximum width of 500 pixels instead of 600.
  • Templates with the word "Slim" in the title are designed with a narrower width to display better on mobile devices. These selections display just fine in email programs that support HTML, however they'll appear narrower than other options.

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