Batch BMP to PNG
Convert BMP images to lossless PNG in your browser
Drop BMP files or folder here
Click to browse — supports .bmp
Tips
BMP — Windows bitmap. Uncompressed, large files, no transparency.
PNG — Lossless compression. Smaller than BMP with identical quality.
Privacy — Your files stay on your device. The browser handles the conversion locally.
Batch — Drop a folder or pick multiple files. If one fails, the rest still convert.
How to Convert BMP to PNG
Drop your BMP files
Drag images from your computer, or click to browse. We accept .bmp files.
Convert instantly
Each BMP is processed locally in your browser using the Canvas API. Your files stay on your device.
Download PNG
Download PNG — lossless with no compression artifacts. Ideal for editing, design, and archival.
About BMP to PNG
BMP and PNG are both lossless formats, but BMP stores pixels uncompressed while PNG applies DEFLATE compression. That means a PNG converted from a BMP is typically much smaller without any loss in quality. PNG also handles transparency, though standard BMP files do not contain an alpha channel.
This tool converts BMP files to PNG directly in your browser. PNG applies lossless DEFLATE compression to the same pixel data, so files get smaller without any quality loss. The conversion runs locally using the Canvas API, so your images are not uploaded.
Output keeps full resolution, exact colors, and no compression artifacts. PNG uses lossless compression, so nothing is thrown away. We do not add watermarks or impose usage limits.
Frequently Asked Questions
Why convert BMP to PNG?
PNG applies lossless compression to the same pixel data, so you get a smaller file with identical quality. PNG is also more widely supported in design tools and web workflows than BMP.
What is PNG format?
PNG is a lossless image format that supports transparency. Unlike BMP, it compresses the image data, which makes files smaller without throwing away any pixels.
Will the image quality be preserved?
Yes. PNG uses lossless compression, meaning no image data is thrown away. Resolution and color accuracy are preserved exactly.
Is there a file size limit?
There is no hard limit. Since processing runs locally in your browser, the practical limit depends on your device's memory. Most BMP images convert instantly.
Do I need to sign up or pay?
No. We do not ask you to subscribe, add watermarks, or hide higher quality behind a paywall. The tool is free to use.
Is my image data safe?
Yes. The conversion happens locally in your browser via the Canvas API. Your files never leave your device.
