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Convert BMP to PNG Online

Convert BMP bitmaps to lossless PNG format online — smaller files, no quality loss.

Processed entirely in your browser — never leaves your device
No software needed — works in any modern browser
Fast — most conversions complete in under a second
Files up to 100MB supported
From
BMPBMP▾
→
To
PNGPNG▾
✅Processed entirely in your browser. Your file never leaves your device — no upload, no server, complete privacy.
Drag & drop your BMP file here or

PNG provides lossless compression, meaning every pixel is preserved exactly. Converting a BMP to PNG significantly reduces file size compared to uncompressed BMP while maintaining pixel-perfect quality. Unlike JPEG, PNG is lossless and supports transparency, making it the best replacement for BMP in most workflows. PNG is accepted by virtually all modern applications and is far more web-friendly than BMP. Dockitt converts BMP to PNG entirely in your browser.

How to use

  1. Click 'Choose BMP' and select the BMP image you want to convert.
  2. Click 'Convert to PNG' and wait while the image is processed.
  3. Download the PNG file.

FAQ

Will the PNG be smaller than the BMP?

Yes, significantly smaller. PNG uses lossless compression that typically reduces BMP file size by 50–80% depending on image content. Images with large areas of solid colour compress particularly well. The compression is lossless, so no pixel data is lost.

Is there any quality loss when converting BMP to PNG?

No. PNG is a lossless format. Every pixel from the source BMP is preserved exactly in the output PNG. Converting BMP to PNG is a safe conversion with zero quality degradation.

Will my PNG work in all applications?

Yes. PNG is one of the most universally supported image formats. It is supported natively on Windows, macOS, Linux, all web browsers, Microsoft Office, most image editors, and the vast majority of applications that handle images.

Is PNG better than BMP for web use?

Yes. Browsers display PNG natively and PNG files are far smaller than BMP for equivalent images. BMP is not suitable for web use due to its very large file sizes and lack of compression. Always use PNG (or WebP) instead of BMP when preparing images for the web.

Does converting BMP to PNG preserve exact colours?

Yes. PNG is lossless, so all colour values are preserved exactly. The RGB values of every pixel in the source BMP will be identical in the PNG output.

Is the conversion done in my browser or on a server?

The conversion runs entirely in your browser using the Canvas API. Your image is never uploaded to any server.