Why convert BMP to PNG?

BMP is an uncompressed bitmap format, so files are large. PNG uses lossless compression that keeps the exact same pixels while producing a much smaller file that web pages and apps accept.

Are my images uploaded to a server?

No. Conversion happens entirely in your browser using the HTML canvas — your images are never uploaded, stored or seen by anyone.

How accurate is the conversion?

PNG is lossless, so the converted image keeps the exact pixels of the source BMP at its original dimensions — the picture is identical, only the file is smaller.

BMP to PNG Converter

Convert uncompressed BMP bitmaps to smaller, lossless PNG.

Convert BMP bitmaps to PNG without uploading them

BMP (Windows bitmap) files store every pixel uncompressed, so they are large and awkward to share. PNG keeps the exact same pixels with lossless compression, producing a much smaller file that virtually every editor, browser and app supports.

Everything runs locally in your browser — your images are never uploaded, stored, or seen by anyone. That makes it both faster (no upload wait) and private by design.