Compress BMP 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. Uncompressed Windows bitmap format with very large file sizes. Not suitable for web use without compression. Use ImageSmith to compress your BMP images to the ideal file size for eBook — target under 2,048KB for optimal performance. Processing is fully browser-based — no server uploads.
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)
Compress BMP for Other Platforms
Compress BMP for eBook — FAQ
eBook works best with images under 2,048KB. Recommended dimensions: 1600×2560 (Amazon Kindle ideal ratio). ImageSmith can compress BMP images to any target size in seconds.
eBook primarily supports JPEG, PNG. Converting to JPEG is recommended for best compatibility.
Upload your BMP image to ImageSmith, set a target size under 2,048KB, and compress. Amazon Kindle recommends 1600×2560 pixels (2:3 portrait ratio)
Amazon Kindle recommends 1600×2560 pixels (2:3 portrait ratio) for eBook covers. Minimum height is 1000px. Keep JPEG files under 2MB. Ensure title text is readable at small thumbnail sizes.