BMP → PNG
Convert BMP to PNG
Shrink a BMP without losing a single pixel: PNG is lossless too, but compressed, so files are much smaller.
How to Convert BMP to PNG
- 01
Add Your BMP Files
Drop BMP files onto the converter, click to choose them, or paste with Ctrl + V. You can add up to 50 at once, and other image formats work too.
- 02
Check the Settings
PNG is already selected. Optionally resize by percentage or to an exact width and height.
- 03
Convert & Download
Press Convert, then download each PNG file or get them all as a ZIP. Everything happens on your device.
BMP vs PNG
.bmp .dib
BMP
A simple Windows format that usually stores pixels without compression. Files are large, but almost any program can read them.
.png
PNG
A lossless format that keeps every pixel exactly and supports full transparency. Ideal for screenshots, logos and graphics with sharp edges or text.
| Property | BMP | PNG |
|---|---|---|
| Full name | Windows Bitmap | Portable Network Graphics |
| Compression | usually uncompressed | lossless |
| Transparency | Yes (full alpha) | Yes (full alpha) |
| Animation | No | No |
| Typical size | Very large: width × height × 3–4 bytes | Often 3–10× larger than JPG for photos |
| Best for | Legacy Windows software and simple pipelines | Screenshots, logos, UI graphics, images with transparency |
| Opens in | All browsers; Windows and most editors | Every browser, phone and editor |
BMP to PNG Questions
Are my BMP files uploaded to a server?
No. The conversion runs in your browser using WebAssembly, so your BMP files never leave your device. Nothing is stored, and the page keeps working even on a slow connection.
Will converting BMP to PNG reduce quality?
No. Both BMP and PNG are lossless, so every pixel is kept exactly.
Will the PNG file be bigger or smaller?
Much smaller. BMP usually stores pixels without compression, so PNG files are often 90% smaller or more.
Is the BMP to PNG converter free?
Yes. There is no sign-up, no watermark and no daily limit. Convert up to 50 files per batch, as many times as you like.