BMP to PNG converter
A free BMP to PNG converter for Windows Bitmap files. Browser-based pairs here usually run in this tab, with no file upload.
Drop your BMP files here
or browse your device · paste with Ctrl+V
Accepts .bmp, .dib files. You can queue several files; each is processed one after another on your own device.
Your files never leave this device — there is no upload and no server to delete them from.
- 01
Add your BMP files
Drop them onto the box above or click to browse. They are read straight from disk — nothing is sent anywhere.
- 02
Check the settings
PNG is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.
- 03
Download your PNG
Press convert and wait for the row to finish. Convert several files and you can take them all as a single ZIP.
BMP
Windows BitmapWindows' uncompressed raster format: every pixel stored literally, which makes it simple to read and enormous on disk. Almost always worth converting to PNG, which is lossless too but far smaller.
- Developed by
- Microsoft
- Released
- 1990
- Extension
- .bmp, .dib
- MIME type
- image/bmp
- Compression
- Uncompressed
PNG
Portable Network GraphicsLossless compression with a real alpha channel, created as a free replacement for GIF. Perfect for logos, screenshots and interface art with sharp edges; wasteful for photographs, where JPEG or WebP will be a fraction of the size.
- Developed by
- PNG Development Group / W3C
- Released
- 1996
- Extension
- .png
- MIME type
- image/png
- Compression
- Lossless
- Specification
- Open
- Both BMP and PNG store every sample exactly, so nothing here is re-compressed — only the container changes.
Questions about converting BMP to PNG
Is this BMP to PNG converter free?
Yes. Converting BMP to PNG here is free, with no account, no watermark and no daily quota. The work runs on your own device, so there is no server cost to pass on to you.
Is my BMP file uploaded anywhere?
For browser-based pairs, your file is read locally and converted by Squoosh in this tab. No file payload is uploaded; you may still see analytics and engine downloads in network logs.
Is there a file-size limit for BMP to PNG?
There is no imposed upload cap when it runs in-browser, but each conversion still depends on your device and browser memory. Large videos are the first practical limit, then memory-heavy documents or images.
Does converting BMP to PNG lose quality?
No. PNG stores its data losslessly, so everything in your BMP file is preserved exactly.
Can I convert several BMP files to PNG at once?
Yes. Drop in several files and each gets its own row; they are processed one after another on your device. You can download them one by one or as one ZIP.
Does BMP to PNG work on a phone, Mac or Chromebook?
Most modern browsers on Windows, macOS, Linux, ChromeOS, Android and iOS work. Very large videos are often more reliable on desktop or a browser with more memory.
Why do some conversions take longer on first run?
The conversion engine has to download first. Small codec bundles are fast, while ffmpeg is commonly 12–30 MB; later conversions of similar type use the cached engine.
I converted a file and the output is blank or unusable. What should I check?
Start over with default settings, then change one option at a time (quality, bitrate, page size, or codec) to isolate what changed behavior. If it keeps failing, retry with a smaller file and confirm the source format matches the pair.
Convert other formats to PNG
16 formats can become PNG here.
Convert BMP to other formats
A BMP file can become any of these.
PNG to BMP
The reverse conversion
JPG to PNG
PDF to PNG
WEBP to PNG
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