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hushvert

BMP converter

BMP files are big, plain and easy to decode, which makes them the easiest format on this site to convert perfectly: the pixels are read exactly and repacked. Decoding happens in your browser, so even that 80MB legacy scan never gets uploaded.

What is BMP?

BMP is the Windows bitmap format from 1987: pixels stored essentially raw, usually with no compression at all. Ancient tooling, scanners, screenshots from legacy systems and some scientific software still emit it, and almost everything can read it, but the files are enormous for what they contain. Converting a BMP loses nothing, because there was never any lossy compression inside to begin with.

Convert BMP to another format

Common questions about BMP

What is a BMP file?
BMP (bitmap, sometimes .dib) is an old, simple Windows image format that usually stores pixels uncompressed. That keeps it lossless and easy for software to read, but the files are large compared with modern formats, and it lacks the compression and broad web support of JPG or PNG. Converting a BMP is the usual way to make it smaller and easier to share.
How do I convert a BMP to JPG or PNG?
Drop your .bmp into hushvert and choose JPG or PNG. The conversion happens in your browser with no upload. PNG keeps the image lossless while typically shrinking it through compression; JPG goes smaller still with lossy compression, which is ideal when the BMP holds a photo.
Will converting a BMP to PNG lose any quality?
No. BMP is lossless and so is PNG, so converting BMP to PNG preserves every pixel exactly while usually cutting the file size through lossless compression. Converting to JPG is lossy and smaller, which is the better pick for photographs but not for sharp graphics or text.
Is converting a BMP private, and which direction does hushvert support?
hushvert converts BMP to JPG and PNG, and only in that direction (out of BMP). Both conversions run client-side in your browser through WebAssembly, so the file never uploads, which you can confirm in airplane mode, the Network tab, or our /privacy-proof page.