Compress BMP Images for Desktop
Desktop wallpapers display across the full screen of monitors. A properly optimized wallpaper looks stunning on modern 4K monitors while keeping the file size reasonable. 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 Desktop — target under 20,000KB for optimal performance. Processing is fully browser-based — no server uploads, no privacy risk.
Recommended format
JPEG
Max file size
20,000KB
Dimensions
3840×2160 (4K), 2560×1440 (1440p), 1920×1080 (1080p)
✓For 4K monitors, use 3840×2160 pixels for full-resolution display
✓JPEG at quality 90 is a good balance for large wallpaper files
✓PNG produces larger files but perfect quality for graphic wallpapers
✓Consider creating multiple resolutions for different screen sizes