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Converter Tools

BMP to PNG Converter

Upload a BMP bitmap and download it as a compressed, lossless PNG — converted entirely in your browser.

BMP → PNGLosslessBrowser basedFree

Last updated: May 30, 2026

Client-Side Processing
Input Data Stays on Device
Instant Local Execution
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What is BMP to PNG Converter?

BMP to PNG converts uncompressed Windows bitmap (.bmp) images into PNG files. PNG uses lossless compression and supports transparency, so it keeps every pixel exactly while producing a much smaller file than the raw bitmap.

This converter decodes your BMP with the browser's image engine and re-encodes it as a PNG. Because the compression is lossless, the image quality is identical to the source. Nothing is uploaded to a server.

How to Use BMP to PNG Converter

1

Drop a BMP file onto the upload area or click to browse

2

The image is decoded and re-encoded as PNG instantly

3

Compare the PNG preview with your original

4

Click Download to save the PNG

Common Use Cases

  • Shrinking uncompressed BMP files without any loss of quality.
  • Converting bitmap graphics to a web-friendly, widely supported format.
  • Preparing screenshots or icons that need crisp, lossless edges.
  • Modernising legacy BMP assets to PNG for the web.

Example Input and Output

A 24-bit BMP graphic converts to a smaller, identical-looking PNG.

Input
logo.bmp (1.8 MB, 24-bit bitmap)
Output
logo.png (240 KB, lossless PNG)

How This Tool Works

The browser decodes the BMP onto a canvas and exports the canvas as a lossless PNG for download.

Technical Stack

TypeScriptCanvas APIcanvas.toBlobPNG encoderClient-side processing

Lossless

PNG keeps every pixel exactly — ideal for graphics, logos, and screenshots.

Privacy

Your image never leaves the browser; conversion is fully client-side.

Frequently Asked Questions

Is my BMP uploaded anywhere?

No. The file is decoded and re-encoded entirely in your browser using the canvas API.

Will I lose any quality?

No. PNG uses lossless compression, so the output is pixel-for-pixel identical to the BMP.

Does PNG keep transparency?

Yes. PNG supports an alpha channel, so any transparency in the source is preserved.

Why is the PNG smaller than the BMP?

BMP is uncompressed, while PNG applies lossless DEFLATE compression, often cutting size dramatically.

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