Compress Images for Mailchimp
Mailchimp email campaigns require properly sized, email-safe images. Optimized images improve email deliverability, load faster in all email clients, and increase engagement rates. Use ImageSmith to compress your Mailchimp images before sending — free, instant, and entirely in your browser. No account needed, no watermarks. Target under 10,240KB for best results on Mailchimp.
Max size
10,240 KB
Format
JPEG
Size
600px wide for email body, 1200×600 for header banners
- 1Email content area is 600px wide — design at 600px or 1200px (2× Retina)
- 2Keep individual images under 200KB for fast email loading
- 3Avoid WebP — Outlook does not support it in emails
- 4Test emails across clients (Gmail, Outlook, Apple Mail) before sending
Compress by format
Other platforms
Mailchimp image compression FAQ
Mailchimp email templates are typically 600px wide. Use 600px or 1200px (for Retina) wide images. Keep each image under 200KB for fast loading. Stick to JPEG and PNG — avoid WebP.