BMPPNG
BMP to PNG Converter
Convert BMP images to PNG in seconds. Your files are processed locally in your browser — nothing is uploaded.
Processed locally in your browser
Why convert BMP to PNG?
BMP files are usually uncompressed and therefore very large. PNG is lossless and supports transparency, which makes it ideal for graphics, screenshots and further editing.
What changes when you convert BMP to PNG
- PNG files are usually noticeably smaller than BMP files for the same image.
- PNG is lossless: every pixel of the decoded image is preserved exactly.
- Transparency is preserved: PNG supports an alpha channel.
How to convert BMP to PNG
- 1
Drop your BMP files into the converter above, paste them, or click to choose files.
- 2
PNG is already selected as the output format. Open Settings to adjust quality, size or metadata.
- 3
Click Convert. Each image is processed on your device in a moment.
- 4
Download your PNG files one by one, or all together as a ZIP.
Private by design
This BMP to PNG converter runs entirely in your web browser using the same image engines that display web pages, plus WebAssembly encoders where needed. Your images are never uploaded for this conversion and nothing is stored.
BMP to PNG: questions & answers
Is converting BMP to PNG free?
Yes, completely free with no sign-up, no watermark and no daily limit.
Will I lose quality converting BMP to PNG?
No. PNG is lossless, so the converted image keeps every pixel exactly as it was decoded from the BMP file.
Can I convert multiple BMP files at once?
Yes. Drop as many files as you like; they are converted in parallel and can be downloaded individually or as a single ZIP.
Are my BMP files uploaded?
No. The conversion runs locally in your browser, so your images never leave your device.
Does it work on iPhone and Android?
Yes. The converter works in current versions of Safari, Chrome, Firefox and Edge on phones, tablets and computers. Very large images may exceed the memory available to mobile browsers.
Why is my BMP file so large?
BMP stores every pixel without compression. Converting to PNG keeps the image lossless while typically making it several times smaller.