BMP to PNG Converter
This tool converts BMP (bitmap) images into PNG files
This tool converts BMP (bitmap) images into PNG files
How to use BMP to PNG Converter
- Drag your BMP file onto the drop zone, or click to choose one or more .bmp files.
- Wait a moment while each image is decoded and re-encoded as a lossless PNG in your browser.
- Click Download PNG for a single file, or Download all to save every converted image.
About BMP to PNG Converter
This tool converts BMP (bitmap) images into PNG files. BMP is an old, uncompressed format that produces very large files, while PNG is a compressed, lossless format that keeps the exact same pixels but is far smaller and supported everywhere on the web. You can drop in a single BMP or select many at once and convert them all in one pass.
Conversion happens entirely in your browser. Each BMP is decoded, redrawn onto a canvas, and re-encoded as a PNG using your browser's built-in image engine. Because PNG is lossless, no image quality is lost. 32-bit BMPs that contain an alpha channel keep their transparency in the resulting PNG. When a browser cannot decode a BMP on its own, the tool falls back to a built-in parser for standard uncompressed 24-bit and 32-bit bitmaps.
Your files never leave your device — there are no uploads, no servers, and no sign-up. The trade-off to know about: PNG output is often smaller than the BMP source, but for photographic images PNG can occasionally be larger than a JPG would be, since PNG is lossless. Very unusual BMP variants (RLE-compressed or palettized bitmaps) may not decode in every browser, and those files are reported rather than silently failing.
Frequently asked questions
- How do I convert a BMP to PNG?
- Drag your BMP file onto the drop zone (or click to choose it), and the PNG is generated automatically. Then click Download PNG. You can select several BMP files at once to convert them in a single batch.
- Will converting to PNG reduce image quality?
- No. PNG is a lossless format, so every pixel from the BMP is preserved exactly. The file is usually smaller because PNG compresses the data, but the image itself is unchanged.
- Are my files uploaded anywhere?
- No. The entire conversion runs locally in your browser using the Canvas API. Your images are never uploaded to a server, so nothing leaves your device.
- Does it keep transparency?
- Yes, if your BMP is a 32-bit bitmap with an alpha channel, the transparency is carried through into the PNG. Most standard 24-bit BMPs are fully opaque and convert to opaque PNGs.
- Can I convert several BMP files at once?
- Yes. Select or drop multiple BMP files and each one is converted to its own PNG. You can download them individually or use Download all to save them in one click.
- Why does one of my BMP files fail to convert?
- Most BMP files convert fine, but rare variants such as RLE-compressed or palette-based bitmaps are not decodable in every browser. When that happens the tool tells you which file was affected instead of producing a broken image.