Convert BMP to PNG
Runs in your browser. Your files never leave your device.
How we keep your files private
How to use Convert BMP to PNG
- Drop your BMP files onto the page, or click to choose them.
- Wait a moment while each file is converted in your browser.
- Download each PNG file, or all of them as a ZIP.
Common uses
- Keeping sharp edges and transparency for logos and graphics.
- Preparing images for editing without further quality loss.
- Using screenshots and artwork where crisp detail matters.
About this tool
BMP is an uncompressed bitmap format that produces very large files. PNG is a lossless format that supports transparency.
PNG keeps transparency and never loses quality when saved, though photos can come out larger than JPG. BMP files are uncompressed, so the converted file is usually far smaller.
Drop one image or many at once: each file is converted separately in your browser using the canvas, then you download the results one by one or all together as a ZIP. Conversion keeps the original pixel dimensions. Nothing is uploaded, so private photos and documents stay on your device. Very large images (tens of megapixels) can be slow or fail on older phones.
Tips and limits. Expect larger files than JPG, because PNG is lossless. Use a compressor afterwards if size matters.
Format comparison
| Format | Compression | Transparency | Best for |
|---|---|---|---|
| JPG | Lossy | No | Photos, sharing |
| PNG | Lossless | Yes | Logos, screenshots, editing |
| WebP | Lossy or lossless | Yes | Websites |
Next steps
Frequently asked questions
Does converting BMP to PNG reduce quality?
No. PNG is lossless, so nothing is lost when saving.
Can I convert several files at once?
Yes. Drop as many as you like; each is converted separately and you can download them all as a ZIP.
Will the PNG keep the original size?
Yes. Pixel dimensions are unchanged; only the file format changes.
Why is the PNG larger than my original?
PNG is lossless, so photos usually produce larger files than JPG. Run the PNG compressor afterwards to shrink it.
Are my files uploaded to a server?
No. Everything runs inside your browser on your own device, so your files and text are never sent anywhere.
Is it really free?
Yes. There is no sign-up, no watermark and no limit on how often you use it.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers. Very large files may be slow on older phones.