Convert BMP bitmaps to PNG- lossless, smaller, and universally compatible.
Open Image ConverterBMP files store uncompressed pixel data, making them unnecessarily large for modern use. Converting BMP to PNG gives you a lossless file that is significantly smaller thanks to PNG's Deflate compression, while preserving every pixel and supporting transparency. PNG is the modern replacement for BMP in virtually every scenario- from web graphics to design assets to document embedding.
Both BMP and PNG can store lossless pixel data, so the conversion is zero-loss. The output PNG is a perfect pixel-for-pixel copy of the BMP, but typically 50-80% smaller thanks to PNG's efficient compression. If the BMP contains 24-bit colour, the PNG will be identical in quality.
| Format | File Size | Quality | Compatibility | Use Case |
|---|---|---|---|---|
| BMP | Enormous (uncompressed) | Perfect (no compression) | Universal (legacy) | Legacy Windows apps, raw pixel data |
| PNG | Medium-Large (lossless compression) | Perfect (lossless) | Universal | Web, design, editing, screenshots, transparency |
| JPG | Small-Medium | High (lossy) | Universal | Photos, email, social media |
| WebP | Smallest | High (lossy or lossless) | Modern browsers | Web performance |
Open the BMP to PNG converter
Click the button above or go directly to /tools/compress. No signup required- the tool is free and works instantly in your browser.
Drop your files
Drag and drop your BMP files onto the upload area, or click to browse. You can convert up to 20 files at once on the free plan (500 on Pro).
Download your PNG files
Click Download on each file or use Download All as ZIP to save everything at once. All processing happens in your browser- nothing is uploaded to a server.
Complete privacy
Your files never leave your device. All conversion happens inside your browser using the Canvas API and WebAssembly.
Instant results
No upload, no queue, no waiting for a server. Conversion starts the moment you drop your files.
True batch processing
Convert up to 20 files at once on free (500 on Pro) and download them all as a ZIP. No signup required.
Always free
Core conversion tools are free forever. No watermarks, no file size caps on common formats, no account required.
Does converting BMP to PNG lose quality?
No. Both BMP and PNG store lossless pixel data. The conversion is a perfect, zero-loss copy. The PNG will look identical to the BMP at every zoom level.
How much smaller is PNG compared to BMP?
PNG is typically 50-80% smaller than the equivalent BMP, depending on image content. A 36 MB BMP photograph might become 8-15 MB as PNG. Images with large flat-colour areas compress even better.
Should I convert BMP to PNG or JPG?
Choose PNG if you need lossless quality, transparency support, or plan to edit the image further. Choose JPG if you want the smallest possible file size and can accept slight quality loss (best for photographs).
Why do some old programs still use BMP?
BMP is one of the oldest image formats (introduced with Windows 1.0 in 1985) and some legacy applications, embedded systems, and industrial equipment still produce BMP output. Converting to PNG modernises these files for everyday use.
Ready to convert? It takes less than 10 seconds.
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