Which images do you use in mailings?

Correctly uploading images in Spotler Mail+ ensures a clean design, faster loading times and better performance across different devices. You can upload images directly in the editor, but good preparation prevents issues such as blurry images or error messages.

On this page you can read more about:

• General guidelines for uploading images
• Choosing the right file type
• Keeping file sizes small
• Matching dimensions to your email layout
• Why this is important

General guidelines for uploading images

The easiest way is to directly upload a final version of your image in Spotler Mail+. Although you can still make edits in the built-in editor, it’s more efficient to do this beforehand.

Note: extremely large files, such as images that are 5000px wide, are not accepted. These files are too heavy for emails and can cause issues with sending or displaying them.

Choosing the right file type

Each file type serves a different purpose. 

• JPEG (JPG)
  Use this file type for your standard images in mailings.
• PNG
  Use PNG for sharp visuals, such as logos, icons, and images with transparency.
• GIF
  Suitable for animated images within your mailing.

Keeping file sizes small

Keep your emails lightweight by following these tips:

• Preferably keep each image under 100KB
• Optimize images for web use before uploading them

Matching dimensions to your email layout

To avoid blurry images and ensure the best display, both on desktop and mobile:

• Upload images at double the width of their final display size in the email
• When in doubt, use a width of 1000px, which is a safe standard for most templates
• Example: a full-width banner in an email of 600px wide should be between 1000–1200px

Why this is important

By following these guidelines you will:

• Make your email load faster
• Increase the chance of successful inbox delivery
• Ensure a consistent appearance on every device and in every email client