b2KIT

Email Banner / Header Image Sizer

Resize and crop images to standard email banner dimensions for all major clients.

Drop an image here or click to browse

Email Width Preset

Email Banner Tips

  • •600px is the most widely supported email width across clients
  • •Keep file size under 200KB for fast loading
  • •Use JPEG for photos, PNG for graphics/text
  • •Recommended banner height: 150-300px
  • •Test in Outlook, Gmail, Apple Mail, and Yahoo
  • •Add alt text for accessibility and image-blocked clients

Part of the upcoming MAPb2/COMBb2 suite.

How to Use Email Banner / Header Image Sizer

  1. 1

    Upload your banner

    Select the image you want to use as an email banner.

  2. 2

    Choose email client

    Pick the target email client or standard banner dimensions.

  3. 3

    Crop and resize

    Adjust the crop area and download the properly sized banner.

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