How can I optimize images for email loading speed?

Image optimization reduces file size without visible quality loss, ensuring fast loading especially on mobile connections. Every kilobyte matters when recipients scroll through emails over cellular data.

Optimization techniques: Choose appropriate format (JPEG for photos, PNG for graphics). Compress aggressively-JPEG at 60-80% quality is usually indistinguishable from 100%. Size images correctly-don't load 2000px images and scale them down with HTML. Use progressive JPEGs-they render increasingly rather than top-to-bottom. Remove metadata-EXIF data adds unnecessary bytes.

Tools: TinyPNG/TinyJPG (web-based compression), ImageOptim (Mac app), Squoosh (Google's web-based optimizer), Photoshop's "Save for Web". Run every image through compression before email inclusion. The cumulative effect across multiple images in one email is significant.

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