BMP to PNG Converter – Convert BMP to PNG Free Online

Convert BMP images to PNG in seconds – up to 5 at a time.

Choose images

BMP images — up to 5 at a time — or drop them here

Your files stay on your device — nothing is uploaded.

Convert BMP to PNG in a few seconds. BMP is an old Windows format that stores images without compression, so files are very large. Choose your BMP files, pick the quality, and download PNG images — everything happens in your browser, so your pictures are never uploaded.

How to convert BMP to PNG

  1. Click "Choose images" or drag and drop up to 5 BMP files into the box.
  2. PNG is lossless, so there is no quality setting to worry about.
  3. Click "Convert".
  4. Download each PNG image, or all of them as a ZIP.

Why use ZentaPDF BMP to PNG?

100% privateFiles are processed in your browser. Nothing is uploaded to any server.
Free, no sign-upNo account, no email, no watermark and no daily limits.
FastNo upload or download wait — results are ready in seconds.
Works everywhereUse it on Windows, Mac, Linux, Android or iPhone in any modern browser.
Keeps qualitySmart settings keep your images sharp.
Large filesHandle big files and many pages — limited only by your device’s memory.

Frequently asked questions

Are my files uploaded to a server?

No. ZentaPDF processes your files inside your own browser using JavaScript. Nothing is uploaded, so nobody else can see your documents — not even us.

Why convert BMP to PNG?

PNG keeps perfect quality with no compression artefacts and supports transparent backgrounds, which is what designers, documents and editing apps need.

What happens to transparent backgrounds?

BMP images have no transparency, so nothing changes.

How many images can I convert at once?

You can convert up to 5 images at a time. When they are done, click "Start over" to convert the next 5.

Is it really free? Do you add a watermark?

Yes, it is completely free with no sign-up, no watermark and no daily limits. The site is supported by a few non-intrusive ads.

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