BMP to PNG Converter – Convert BMP to PNG Online Free
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BMP to PNG Converter

Convert BMP images to PNG format online for free. PNG achieves significant file size reduction through lossless compression — meaning no image quality is lost, making it the ideal lossless replacement for BMP.

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BMP to PNG Converter

Use this converter when you need to reduce a BMP file's size without losing any image quality — particularly for screenshots, UI graphics, logos, or any image with text where lossless quality is non-negotiable.

Drag & drop your file here

or click to browse from your computer

Accepted: .bmp
filename
0 KB

About the BMP to PNG Converter

BMP stores uncompressed pixel data while PNG uses lossless deflate compression. For screenshots and graphics with large uniform areas, PNG typically achieves 60–80% size reduction over BMP with zero quality difference. Additionally, PNG supports full alpha-channel transparency, which BMP does not — so converting to PNG also unlocks that capability for future use.

When to use this tool

Use this converter when you need to reduce a BMP file's size without losing any image quality — particularly for screenshots, UI graphics, logos, or any image with text where lossless quality is non-negotiable.

Common use cases

Lossless screenshot conversion Convert Windows screenshots from BMP to PNG to save space while keeping every pixel perfectly sharp and unchanged.
Graphics with text PNG's lossless compression keeps text and line art sharp — ideal for screenshots, diagrams, and interface captures.
Archiving with quality preservation Store BMP images as PNG to free up disk space without any risk of introducing compression artefacts.
Preparing images for editing PNG is the preferred lossless format for further editing — convert BMP to PNG before working on the image in a photo editor.

How to convert your file

  1. Drag your file into the upload box above, or click the area to browse your device.
  2. Confirm the filename and size appear correctly in the preview.
  3. Click Convert Now and wait a few seconds while we process.
  4. Use the green download button to save your converted file.

Tips for best results

  • BMP to PNG conversion is completely lossless — not a single pixel of quality is sacrificed.
  • PNG files will be significantly smaller than the original BMP, but larger than a JPG of the same image. PNG prioritises quality over compression ratio.
  • After converting to PNG, the image gains transparency support — useful if you want to remove a background in an image editor.

FAQs

None. PNG uses lossless compression, so every pixel in the output is identical to the source BMP. The only change is the file size and format.

For screenshots and graphics with large flat-colour areas, PNG is typically 60–80% smaller than BMP. For photos with many colour variations, the reduction is smaller — around 30–50%.

Standard BMP files do not support alpha-channel transparency. PNG does. After converting, you can use an image editor to add or modify transparency in the PNG.

Use PNG when quality matters most (screenshots, text, graphics with sharp edges). Use JPG when file size matters most and the image is a photo. PNG is always the safe lossless choice.

Yes. BMP is a well-standardised format and this converter handles all standard BMP files correctly, including those created by older Windows applications and Paint.

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BMP to JPG Converter PNG to JPG Converter PNG to WEBP Converter
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