Compress image for Mailchimp Campaign
Mailchimp email templates render images at up to 600 px wide (1200 px for retina).
Your images stay on your device. Nothing is uploaded.
Mailchimp email templates render at 600 px max width in most default templates. Uploading 4000 px camera images is wasted email weight — recipients on 3G still pay for the download even though the render is 600 px.
This preset produces a 1200 px JPEG at quality 85 — retina-safe at Mailchimp render size, under 1 MB per image.
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Frequently asked questions
- What's the attachment size limit for Mailchimp?
- Mailchimp caps attachments at the size the preset on this page targets. Anything above the cap either gets rejected or gets converted to a link-share fallback (like Gmail's Drive attachment).
- Why compress before attaching to Mailchimp?
- Recipients may be on slow mobile connections, and their servers may enforce lower caps than yours. Compressing before send maximises deliverability and speeds up download for recipients on mobile.
- Does Mailchimp compress images automatically?
- Mailchimp does not re-compress attachments the same way social media platforms do — what you send is what the recipient receives. So the size at send equals the size at receive.
- What format is best for Mailchimp?
- JPEG is the safest universal choice for email attachments — every email client can preview it inline. WebP support varies (Outlook desktop can't preview WebP), so JPEG remains the default.
- Is my image uploaded to a server?
- No. Compression runs entirely in your browser. Only when you attach the compressed result to your email does it leave your device.
Compress an image for Mailchimp.
Land under the target size in seconds. Nothing uploaded — runs entirely in your browser.
Start compressing