Mailchimp image specs
Mailchimp email image sizes: 660–1,320 pixels wide in the new builder, 600–1,200 in the legacy builder, PNG, JPG or GIF, 1 MB maximum recommended.
All Mailchimp image requirements
Source: Mailchimp Help — Image Recommendations for Content Blocks; Use the Content Studio; Troubleshooting Images in Emails; Use Image Content Blocks in the New Builder; Upload, Add, and Edit Images in Emails and Landing Pages. Checked 12 October 2026. Read again · 12 October 2026
- Recommended
- Images 660–1,320 pixels wide in the new builder and 600–1,200 pixels wide in the legacy builder; Mailchimp resizes an image to fit the content block it is added to
- Template width
- Templates in the new builder are 660 pixels wide and legacy email templates are 600 pixels wide
- File size
- A maximum of 1 MB per image is recommended; the content studio takes uploads of images up to 1 MB each and other file types up to 10 MB each
- Formats
- PNG, JPG or GIF, with PNG to maintain transparency; the content studio supports JPG, JPE, JPEG, GIF, PNG and BMP image files
- Column widths
- Recommended minimum image widths in the new builder are 660 pixels for full-width sections, 330 for 2 columns, 220 for 3 columns and 165 for 4 columns; in the legacy builder 564, 264, 164 and 132 pixels
- Retina displays
- In the new builder a minimum of 660 pixels is recommended, doubled to a minimum of 1,320 pixels for images to look good on retina displays
- Colour mode
- RGB colour mode or profile; CMYK doesn't render accurately online and can break an embedded image
- Resolution
- 72 DPI is generally enough for the web, but isn't required
- Logo
- In the legacy builder default logo blocks match the dimensions of an Image content block, with a recommended minimum image width of 564 pixels
- Landing pages
- For a landing page set to 100% width, images between 1,500 and 2,500 pixels wide are recommended; images larger than 2,500 pixels may not be resized properly
What Mailchimp asks for, covered.
Mailchimp recommends images 660 to 1,320 pixels wide in its new builder and files of 1 MB or less. Herofab's square 2K output is 2,048 pixels wide and heavier than 1 MB, so it has to be resized and compressed before upload; the JPG download is the lighter file. For a full-width landing page Mailchimp recommends 1,500 to 2,500 pixels, and a 2,048-pixel image is inside that range.
Resize for email
Square 2K output is 2,048 pixels wide, above the 1,320 pixels Mailchimp recommends for retina displays.
Under 1 MB
The content studio takes images up to 1 MB; a 2K file is heavier and has to be compressed.
Inside the landing page range
A 2,048-pixel image is inside the 1,500 to 2,500 pixels recommended for a full-width landing page.
Mailchimp, answered.
What image size is right for Mailchimp?
Mailchimp email image sizes: 660–1,320 pixels wide in the new builder, 600–1,200 in the legacy builder, PNG, JPG or GIF, 1 MB maximum recommended.
How large can an image file be for Mailchimp?
A maximum of 1 MB per image is recommended; the content studio takes uploads of images up to 1 MB each and other file types up to 10 MB each. Source: Mailchimp Help — Image Recommendations for Content Blocks; Use the Content Studio; Troubleshooting Images in Emails; Use Image Content Blocks in the New Builder; Upload, Add, and Edit Images in Emails and Landing Pages, checked 12 October 2026.
Which image formats can be used for Mailchimp?
PNG, JPG or GIF, with PNG to maintain transparency; the content studio supports JPG, JPE, JPEG, GIF, PNG and BMP image files. Source: Mailchimp Help — Image Recommendations for Content Blocks; Use the Content Studio; Troubleshooting Images in Emails; Use Image Content Blocks in the New Builder; Upload, Add, and Edit Images in Emails and Landing Pages, checked 12 October 2026.
Can I check my images before uploading?
Yes. The free image size checker reads each file in your browser and tests it against these rules; the image is not uploaded.
Where do these figures come from?
From Mailchimp Help — Image Recommendations for Content Blocks; Use the Content Studio; Troubleshooting Images in Emails; Use Image Content Blocks in the New Builder; Upload, Add, and Edit Images in Emails and Landing Pages, read on 12 October 2026. Platforms update their specs; the official page is the final reference.
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