Why convert BMP to PNG?

BMP files are uncompressed and very large. PNG is lossless and typically reduces file size by 5–10× with identical pixel data.

Are my files uploaded?

No. Conversion is handled by the browser canvas API; the BMP is decoded locally.

No. PNG is lossless. The pixel values are preserved exactly.

BMP to PNG Converter

Convert legacy .bmp bitmaps to compressed PNG. Lossless conversion — your pixels stay pixel-perfect, but the file shrinks dramatically. Runs locally in your browser.

100% client-side · no upload

BMP file(s)

Select one or more files to begin.

How to convert BMP to PNG

Pick one or more .bmp files.
Press Convert to PNG. Each file is decoded and re-encoded as lossless PNG.
Download each PNG result.

Common use cases

Web upload: most web platforms reject BMP outright.
Archiving old screenshots in a fraction of the disk space.
Migrating legacy assets: game and DOS-era assets often ship as BMP.

Frequently asked questions

Will the PNG look identical?

Yes — PNG compression is lossless, so every pixel is identical.

How much smaller will the PNG be?

Typically 5–10× smaller for screenshots and UI captures; less for noisy photo BMPs.

Are 24-bit and 32-bit BMPs both supported?

Yes, the browser canvas decoder handles common BMP variants. Very old 1-bit / 4-bit BMPs may need a one-off conversion in a desktop tool first.

Report a problem with this tool