Compress BMP Images for Facebook

Facebook recompresses images on upload, and uses aggressive compression for link previews. Pre-optimizing your images ensures they maintain quality after Facebook's processing. 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 Facebook — target under 4,000KB for optimal performance. Processing is fully browser-based — no server uploads, no privacy risk.

Recommended format

JPEG

Max file size

4,000KB

Dimensions

1200×630 (link previews), 1080×1080 (square posts)

Use sRGB color profile for accurate colors across devices
Keep profile photos at 170×170 and cover photos at 820×312
Link preview images should be 1200×630 for optimal display
Upload PNG for graphics with text to avoid JPEG artifacts

Compress BMP for Other Platforms

Compress BMP for Facebook — FAQ