BMP to PNG converter
Convert BMP images to PNG in seconds, one at a time or in bulk. Your files are converted on your own device and never uploaded.
Private: your images are processed on your device and never uploaded.
How to convert BMP to PNG
- Add your BMP files. Drag them in, click to choose or paste. Add as many as you like.
- Adjust if needed. PNG is lossless, so there is no quality setting. Optionally resize large images.
- Download. Save each PNG on its own or click “Download all” for a ZIP.
Why convert BMP to PNG?
PNG keeps every pixel of your BMP exactly, but compresses it losslessly to a fraction of the size, and every app supports it.
BMP is an old uncompressed Windows format. BMP files are huge and are not supported by most websites. PNG is a lossless format with transparency support, ideal for logos, screenshots and graphics with sharp edges.
Frequently asked questions
Is BMP to PNG lossless?
Yes. PNG is a lossless format, so the image is pixel-for-pixel identical.
Are my images uploaded to a server?
No. Every image is processed inside your browser using WebAssembly. Nothing is sent over the internet, which also makes it fast and safe for private photos.
Is it really free? Are there limits?
Yes. It’s free with no sign-up, no watermark and no daily limit. Your own device does the work, so there is no server cost per image.
Is image quality affected?
No. PNG is lossless, so the converted image looks exactly like the original.
Does it work on my phone?
Yes. It works in any modern browser on iPhone, Android, Mac, Windows and Chromebook. You can also add it to your home screen and use it offline.