Compress image for Email Banner / Header
Email banners render at 600–700 px; upload at retina 1400 px for sharpness.
Your images stay on your device. Nothing is uploaded.
Email header banners typically render at 600–700 px wide in the client. Landing at 1400 px keeps the banner retina-sharp on modern mobile devices without pushing individual message size over 500 KB.
This preset produces a 1400 px JPEG at quality 82 — retina-safe for email headers.
Related tools
- Compress image for Gmail Attachment (Under 25 MB Cap)
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Frequently asked questions
- What's the attachment size limit for Email banner?
- Email banner 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 Email banner?
- 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 Email banner compress images automatically?
- Email banner 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 Email banner?
- 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 Email banner.
Land under the target size in seconds. Nothing uploaded — runs entirely in your browser.
Start compressing