Convert BMP to PNG
To convert BMP to PNG, add your .bmp file below and press the button: it's processed on your own device and you download the result, with nothing uploaded. It's free, needs no account, and works with files up to 500MB.
Tip: add several files at once to convert them in one go and download them as a ZIP.
About converting BMP to PNG
BMP (.bmp) files can be converted to PNG entirely in your browser — no software to install, no file upload, and no account required. The conversion runs on the browser's own Canvas API directly on your device.
Technical comparison
| BMP | PNG | |
|---|---|---|
| Category | image | image |
| Compression type | Uncompressed (occasionally simple RLE) | Lossless (DEFLATE) |
| Typical file size | Very large — essentially uncompressed pixel data | Moderate — larger than JPEG for photos, smaller for flat-color graphics |
| Transparency support | Rare (v4/v5 support alpha, but rarely used in practice) | Yes (full 8-bit alpha channel) |
How to convert BMP to PNG privately
Every step below runs on the browser's own Canvas API inside this browser tab. Your .bmp file is never uploaded to a server — there's no network request carrying it anywhere.
Add your BMP file
Drag and drop, or click to select, a file (.bmp). It's read straight from disk into browser memory — no upload step exists.
Convert locally
FreePrivateConvert converts it to PNG using the browser's own Canvas API, entirely within this browser tab.
Download the result
Save your converted .png file. It only ever existed in this tab's memory — closing the tab without downloading discards it completely.
Convert BMP to PNG with ffmpeg (command line)
Prefer the terminal? This page uses your browser's built-in image engine; the equivalent ffmpeg command is:
ffmpeg -i input.bmp output.png- -i input.bmp
- Your BMP file.
- output.png
- The PNG file to create. ffmpeg picks the container from this extension.
Don't have ffmpeg installed? You don't need it: use the converter at the top of this page. It runs this conversion on your own device, and your file is never uploaded.
FAQ
- Is my file uploaded anywhere?
- No. Your file is read and processed inside this browser tab and never leaves your device. You can confirm it in your browser's developer tools: the Network tab shows no upload.
- Does converting BMP to PNG reduce quality?
- No further loss: PNG is lossless, so the result looks exactly like the decoded BMP, though the file is usually larger.
- Is there a file size limit?
- Yes: 500MB per file. There's no account and no limit on how many files you convert.
- What's the difference between BMP and PNG?
- BMP (Bitmap) and PNG (Portable Network Graphics) store data differently. BMP: uncompressed (occasionally simple RLE). PNG: lossless (DEFLATE). PNG is a lossless, compressed image format with full alpha transparency — the standard choice for graphics, screenshots, and anything with sharp edges or text.
- Why convert BMP to PNG?
- Common uses for PNG: Screenshots; Logos and icons; UI/design assets requiring transparency. Lossless DEFLATE compression means no artifacts around text, logos, or hard edges, unlike JPEG.
- What MIME type does a .png file use?
- image/png, the standard type for Portable Network Graphics.
- What is the ffmpeg command to convert BMP to PNG?
- Run: ffmpeg -i input.bmp output.png. This page does the same conversion with your browser's built-in image engine, so you don't need to install ffmpeg.
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