Compress image for Transactional Email
Transactional emails need to arrive reliably. Under 200 KB per image is safe for every SMTP provider.
Your images stay on your device. Nothing is uploaded.
Transactional emails (order confirmations, receipts, password resets, notifications) are sent via SMTP providers like SendGrid, Postmark and Amazon SES. All have per-message size caps in the 10–30 MB range; keeping individual images small maximises deliverability across every ISP filter.
This preset produces a 1200 px JPEG at quality 82 — safe across every major transactional-email pipeline.
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Frequently asked questions
- What's the attachment size limit for Transactional email?
- Transactional email 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 Transactional email?
- 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 Transactional email compress images automatically?
- Transactional email 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 Transactional email?
- 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 Transactional email.
Land under the target size in seconds. Nothing uploaded — runs entirely in your browser.
Start compressing