File Converter

BMP to PNG converter Free, private, no upload.

Convert BMP files to PNG right in your browser. PNG keeps every pixel exactly and supports transparency, which makes it ideal for editing, screenshots and graphics. Your files are never uploaded.

or drop files anywhere · paste with Ctrl/⌘ + V

How to convert BMP to PNG

  1. 1 Drop your BMP files onto the page, or click “Choose files”. You can add many at once, or a whole folder.
  2. 2 PNG is already selected as the output. Optionally open Options to adjust max width, max height, rotate.
  3. 3 Click Convert, then Save. Converting several files? Save them all as one ZIP.

About the formats

BMP · Bitmap image

BMP is an uncompressed Windows bitmap format. Files are very large but simple, and are still used by some legacy and embedded software.

PNG · Portable Network Graphics

PNG is a lossless image format with full transparency support. It is the standard for screenshots, logos and graphics with sharp edges.

The conversion runs on your device using jSquash (MozJPEG, OxiPNG, libwebp, libavif and libjxl) compiled to WebAssembly. You can adjust: max width, max height, rotate, flip, png optimisation.

Frequently asked questions

How do I convert BMP to PNG?

Drop your BMP files onto the page, or click “Choose files”. You can add many at once, or a whole folder. PNG is already selected as the output. Optionally open Options to adjust max width, max height, rotate. Click Convert, then Save. Converting several files? Save them all as one ZIP.

Are my files uploaded to a server?

No. The conversion runs entirely in your browser using WebAssembly. Your files never leave your device, so it is safe for private photos, contracts and business data. Once the page has loaded it even works offline.

Will converting BMP to PNG reduce quality?

No. Both BMP and PNG keep full quality, so the conversion is lossless.

Can I convert multiple BMP files to PNG at once?

Yes. Add as many BMP files as you like; they are converted in parallel on your device and you can download them all as a single ZIP.

Is it free? Are there limits?

It is free, with no sign-up, no watermark and no daily limits. Because nothing is uploaded there is no upload size limit either; the only limit is your device’s memory, which matters mostly for very large videos.

See everything the BMP converter and the PNG converter can do.