Compress image to Under 10 MB for Email
Corporate email systems (Exchange, corporate Postfix) commonly cap at 10 MB.
Your images stay on your device. Nothing is uploaded.
Many corporate email systems cap SMTP attachment size at 10 MB — a conservative default that avoids server-side re-transmission delays. B2B email at scale (procurement, HR, legal) typically observes this ceiling.
This preset produces a 2800 px JPEG at quality 90 — corporate-email-safe.
Related tools
- Compress image for Gmail Attachment (Under 25 MB Cap)
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- Compress image for Newsletter (Generic Email Template)
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Frequently asked questions
- What's the attachment size limit for Email (10 MB cap)?
- Email (10 MB cap) 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 (10 MB cap)?
- 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 (10 MB cap) compress images automatically?
- Email (10 MB cap) 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 (10 MB cap)?
- 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 (10 MB cap).
Land under the target size in seconds. Nothing uploaded — runs entirely in your browser.
Start compressing