Compress BMP Images Online — Free & Ad-Free
Uncompressed Windows bitmap format with very large file sizes. Not suitable for web use without compression. ImageSmith's free BMP compressor reduces file sizes by 60–90% using lossless compression, entirely in your browser. BMP files are completely uncompressed. Converting BMP to JPEG or WebP reduces file size by 90–99% with minimal perceptible quality loss.
✓Zero quality loss — stores raw, uncompressed pixel data
✓Simple format, universally readable on Windows
✓No compression artifacts of any kind
Compress BMP to a Specific Size
Other Format Compressors
When to Use BMP
Avoid BMP for web delivery. Use it only for Windows application assets or intermediate editing files before final export.