Convert images to uncompressed BMP format for legacy systems and print workflows.
BMP Converter
Convert images to uncompressed BMP format for legacy systems and print workflows.
About the BMP converter
Legacy bitmap output
BMP output is mainly for tools or systems that explicitly require bitmap files. The converter redraws the input image to a canvas, can reduce the maximum width first, and then asks the browser to encode image/bmp.
Large files and browser support
Because BMP encoding depends on OffscreenCanvas support in the current browser, some browsers may fail or return a fallback format. BMP also discards animation and original metadata in this flow, and files can grow quickly, so resizing before export is often useful.
FAQ
Common questions and answers about this topic.
Are my images uploaded to a server?
No. All conversion runs entirely in your browser inside a Web Worker. Your images never leave your device.
Why are BMP files so large?
BMP stores raw pixel data without any compression — every pixel takes 24 or 32 bits. A 1920×1080 image is roughly 6 MB as BMP versus 200–500 KB as JPG. BMP is appropriate when an application explicitly requires uncompressed input; for general use, prefer PNG (lossless compression) or JPG (lossy).
Is BMP supported on all browsers?
Most browsers support reading BMP. For encoding (saving as BMP), Chrome and Edge work natively; Firefox and Safari may fall back to PNG. If your downloaded file appears as PNG instead, your browser does not support BMP encoding — try Chrome or use a desktop tool.