Convert BMP images into PNG, or encode a PNG back into a BMP file for broader compatibility.
Last updated: June 2026 | By Workshelve Team
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BMP files are simple bitmap images, while PNG is a compressed, widely supported format that usually produces smaller files and better web compatibility. This tool converts between the two locally in your browser.
Use BMP to PNG when you want a lighter file for the web, or PNG to BMP when you need a format that is easy to inspect and exchange with older software.
Choose a BMP file, preview it, and click Convert to generate a PNG download.
Choose a PNG file, preview it, and click Convert to encode a BMP file with the same dimensions.
BMP, short for Bitmap Image File, is a raster image format developed for Microsoft Windows. BMP files commonly store raw pixel data with little or no compression, which keeps the image data simple but can produce very large files.
BMP is still used by legacy Windows applications, industrial software, image-editing workflows, archival systems, and programs that require a straightforward bitmap format.
PNG, short for Portable Network Graphics, is a raster image format that uses lossless compression. It reduces file size without discarding image detail, so the converted image keeps its visual quality.
PNG supports alpha transparency and usually produces much smaller files than BMP. It is widely supported by websites, browsers, applications, image editors, and other digital graphics tools.
| Feature | BMP | PNG |
|---|---|---|
| Compression | Usually none | Lossless |
| File size | Large | Usually smaller |
| Transparency | Limited or inconsistently supported | Yes, including alpha transparency |
| Image quality | Original pixel data | Original quality with lossless compression |
| Best for | Legacy software and bitmap workflows | Websites, apps, and digital graphics |
Convert BMP to PNG when you need a more practical file for modern websites, applications, storage, or sharing.
Convert PNG to BMP when another application, device, or workflow specifically requires a bitmap file.
The selected image is decoded and converted entirely within your browser. The converter does not need to upload the file to a remote server.
Your image stays on your device throughout the conversion process. Processing happens locally in your browser, and the converter does not upload, store, or transmit your file.
No intentional quality reduction is applied. PNG uses lossless compression, so the decoded pixel data can be stored without the quality loss associated with lossy formats.
BMP files often contain uncompressed or lightly compressed pixel data. PNG uses lossless compression to represent the same image more efficiently, which can substantially reduce file size.
Yes. PNG supports alpha transparency, including partially transparent pixels.
Some BMP variants can contain alpha data, but transparency support is inconsistent across older viewers and applications. A target program may display transparent areas as opaque.
No. The converter reads, processes, and creates the image locally in your browser.
The component does not apply a fixed file size limit. The practical limit depends on your browser, device memory, and image dimensions. Very large images may take longer to process or may fail on devices with limited memory.