Compression

How to Compress Images for Email

Email clients reject oversized images. Learn the right size and quality thresholds for email-friendly attachments.

2026-05-255 min read

Stay Under 10 MB Per Attachment

Many email services block attachments larger than 10 MB or 25 MB. Compress images before attaching so the email is delivered without errors.

Cameras produce images that are much larger than what an email reader needs. Resize to 1600 px on the longest side before compression.

JPG is the safest format for email attachments. WebP and AVIF are not supported by all email clients.

Compress JPG, PNG, and WebP images online with Kompresio. Fast, private, browser-based image compression with batch ZIP download support.

Compression

Resize JPG, PNG, WebP, and AVIF images by width, height, percentage, or preset directly in your browser.

Resize

Convert JPG, PNG, and other images to WebP in your browser. Kompresio helps create lightweight WebP files for faster websites.

Conversion