BMP to PNG
Convert large BMP files to PNG format. PNG compression reduces BMP file sizes by up to 90% while keeping full image quality.
BMP is an uncompressed format that stores every pixel as raw data — a 1920×1080 screenshot can be over 6MB as BMP. Converting to PNG applies lossless compression and typically reduces file size by 60–90% with no quality loss.
Drag & drop or click to upload
Supports image/bmp — processing happens in your browser
Frequently Asked Questions
How much smaller will PNG be compared to BMP?
PNG uses lossless compression and is typically 60-90% smaller than an equivalent BMP file.
Is any quality lost when converting BMP to PNG?
No. Both BMP and PNG store exact pixel data. PNG compression is lossless, so every pixel is preserved identically.
Is my file uploaded to a server?
No. Conversion runs entirely in your browser using the Canvas API. BMP files are never transmitted anywhere.
Should I use PNG or WebP for web use?
For web use, WebP is the better choice — it's typically 30–50% smaller than PNG while remaining lossless. Use PNG when you need broad software compatibility or are editing in design tools.