Compress BMP Images Online — Free, No Upload
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.
BMP Compression FAQ
Upload your BMP image to ImageSmith, set your target file size or quality percentage, and click Compress. Your compressed BMP downloads instantly — no account and no watermark required.
BMP uses lossless compression — every pixel is preserved exactly. ImageSmith typically converts BMP to WebP for significant size reduction without any quality loss whatsoever.
BMP files are completely uncompressed. Converting BMP to JPEG or WebP reduces file size by 90–99% with minimal perceptible quality loss. ImageSmith uses a binary search algorithm to automatically find the highest quality setting that achieves your target file size.
Completely safe. ImageSmith runs entirely in your browser using the Canvas API. Your BMP images never leave your device — zero server uploads.
There is no file size limit. ImageSmith processes BMP images of any size locally in your browser. Larger images may take slightly longer, but there is no upload size cap imposed by our servers.