UnlimitedConvert
BMP to PNG Converter
Turn BMP files into PNG in seconds. Everything happens on your device: nothing is uploaded, and there's no limit.
Your images are processed in this browser tab and never uploaded.
Why convert BMP to PNG?
BMP files are uncompressed and very large.
PNG keeps every pixel and supports transparency, so nothing is lost and it is accepted by every app and website.
BMP to PNG: same pixels, far smaller file
PNG is lossless like BMP, so the converted image is pixel-for-pixel identical, but compressed. Screenshots and graphics usually shrink by 80 to 95%.
It's the safest choice when you want to keep the exact image while getting a file every website, browser and app supports.
Tips
- Photos in BMP shrink most as JPG; screenshots and graphics shrink well as PNG with no loss.
- 32-bit BMPs with an alpha channel keep their transparency in the PNG.
- Converting back to BMP later gives the same image, as nothing is lost.
How to convert BMP to PNG
Add your files
Drop your BMP files into the box or tap “select files”. Add as many as you like.
Pick the options
No settings needed: the defaults give the best result.
Convert and download
Press Convert. Download each PNG on its own, or everything at once as a ZIP file.
BMP vs PNG
| BMP | PNG | |
|---|---|---|
| Full name | Windows Bitmap | Portable Network Graphics |
| Compression | Lossless | Lossless |
| Transparency | No | Yes |
| Animation | No | No |
| Best for | old Windows programs, embedded devices and tools that require uncompressed images | logos, screenshots, graphics with text and anything that needs a transparent background |
| Support | Opens on Windows, macOS and most image editors. | Opens everywhere, including all browsers and design tools. |
About the formats
BMP (Windows Bitmap, 1990) is a simple, uncompressed Windows format. Files are large because every pixel is stored as-is, but almost any program, including very old software and embedded devices, can read it.
PNG (Portable Network Graphics, 1996) is a lossless format that keeps every pixel exactly. It supports full transparency, which makes it the standard for logos, screenshots and graphics with sharp edges.
Frequently asked questions
How do I convert BMP to PNG?
Drop your BMP files into the box above (or tap Select files), check the options, then press Convert. Each PNG downloads on its own, or you can download them all as one ZIP file.
Are my files uploaded anywhere?
No. The conversion runs entirely in your browser on your own device. Your BMP files are never sent to a server, so they stay private, and it works even on a slow connection once the page has loaded.
Is there a limit on how many BMP files I can convert?
No. Convert as many as you like, for free, without signing up. Very large batches are processed one after another so your browser stays responsive.
Will I lose quality converting to PNG?
No. PNG is lossless, so the converted image keeps every pixel of the original.
Is there any quality loss?
No. PNG is lossless, so every pixel is the same as in the BMP.
Does it work on iPhone and Android?
Yes. It works in Safari, Chrome, Firefox and Edge on phones, tablets and computers. Nothing to install.