Compress JPEG Images for eBook
eBook covers are the primary marketing asset for digital books on Amazon Kindle, Apple Books, and other platforms. A high-quality optimized cover stands out in store search results. The most widely used lossy image format, ideal for photographs and complex images with millions of colors. Use ImageSmith to compress your JPEG images to the ideal file size for eBook — target under 2,048KB for optimal performance. Processing is fully browser-based — no server uploads, no privacy risk.
Recommended format
JPEG
Max file size
2,048KB
Dimensions
1600×2560 (Amazon Kindle ideal ratio)
✓Amazon Kindle recommends 1600×2560 pixels (2:3 portrait ratio)
✓Minimum height 1000px, ideal height 2500px for best store display
✓Keep cover JPEG files under 2MB
✓Text must be readable at thumbnail size (around 100px tall)