Image Compressor

Compress image for Klaviyo Campaign

Klaviyo email templates render at 600 px max. 500 KB JPEG at 1200 px is retina-optimal.

Your images stay on your device. Nothing is uploaded.

Klaviyo's e-commerce email templates render images at 600 px max width. Klaviyo's own image CDN re-encodes uploads, but starting from an already-optimised source produces cleaner final rendering than uploading a raw camera export.

This preset produces a 1200 px JPEG at quality 82 — Klaviyo-optimal for retina rendering.

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Frequently asked questions

What's the attachment size limit for Klaviyo?
Klaviyo 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 Klaviyo?
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 Klaviyo compress images automatically?
Klaviyo 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 Klaviyo?
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 Klaviyo.

Land under the target size in seconds. Nothing uploaded — runs entirely in your browser.

Start compressing