Compress HEIC 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. High Efficiency Image Format — the default photo format on iPhones and modern Apple devices. Excellent compression. Use ImageSmith to compress your HEIC 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)