How to use
- Select or drop BMP images (batch supported).
- Adjust output quality, 85 by default.
- Click "Convert all & download" — files usually shrink by 90%+.
FAQ
How much smaller will BMP get?
BMP is uncompressed, so expect a 90%–95% reduction with virtually no visible difference at normal quality settings.
Are 16-color or 256-color legacy BMPs supported?
Yes — the browser decodes palette bitmaps fine, and the output upgrades to true color.
Is BMP transparency preserved?
Most BMPs have no alpha (except 32-bit alpha BMPs); ordinary BMPs are treated as opaque.
About this BMP to WebP
BMP is a nearly uncompressed raw bitmap: a single 1080p screenshot easily exceeds 6MB, useless for the web. After converting to WebP, the file typically lands at 5%–10% of the original at near-identical quality — easy to upload, share or embed. Scans and exports from legacy software can all be slimmed down here in one click.