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Convert BMP to PNG

Free, private, and instant — your files never leave your device.

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BMP (Windows Bitmap) stores pixels as raw, uncompressed bytes — there is no compression at all. A single 1920×1080 BMP occupies roughly 6 MB regardless of whether the image is a white canvas or a complex photograph. That makes BMP the largest common image format by a significant margin. PNG applies lossless DEFLATE compression — no pixel is ever modified, just stored far more efficiently. The output is bit-for-bit identical to the BMP in image content. The size reduction when converting BMP to PNG is typically 5–10× — among the most dramatic jumps possible between any two image formats.

When you’d want this conversion

  • Reducing massive BMP files before sharing, emailing, or uploading — BMP has no compression
  • Converting Windows screenshots or system-resource graphics exported as BMP
  • Archiving pixel art, icons, or diagrams with zero quality loss
  • Getting an uncompressed Windows graphic into a lossless, web-compatible format
From.bmp

BMP

Windows Bitmap

  • Lossless compression
  • Supports transparency
  • Best for: Windows system resources, raw pixel exports from graphics tools
To.png

PNG

Portable Network Graphics

  • Lossless compression
  • Supports transparency
  • Best for: screenshots, logos, graphics with transparency, diagrams

More BMP Conversions

Convert BMP to JPEG Convert BMP to WebP Convert BMP to AVIF

Convert Other Formats to PNG

Convert JPEG to PNG Convert WebP to PNG Convert GIF to PNG Convert AVIF to PNG Convert HEIC to PNG Convert SVG to PNG

Related Tools

Image to PDF Compress BMP Image Converter

Related Guide

PNG vs JPG vs WebP vs AVIF

How to Use

  1. 1

    Drop your BMP file or click to browse — the output format is already set to PNG.

  2. 2

    No quality slider appears — PNG is always lossless, so there is nothing to configure.

  3. 3

    Click "Convert to PNG" — conversion runs entirely in your browser.

  4. 4

    Download the PNG.

Frequently Asked Questions

How much smaller will the PNG be compared to the BMP?

Typically 5–10× smaller at equivalent visual quality. BMP stores every pixel as raw bytes with no compression — any format that applies compression produces a dramatic reduction.

Why is BMP so large in the first place?

BMP stores each pixel as raw bytes with no compression applied. A 24-bit BMP at 1920×1080 requires exactly 1,920 × 1,080 × 3 bytes ≈ 6 MB regardless of image content. Every other common image format applies at least some compression to reduce that footprint.

Will the PNG quality look identical to the BMP?

PNG captures the image pixel-for-pixel from the BMP source. If the BMP was lossy, the PNG preserves exactly what is there now — no further loss is introduced, but no previously discarded detail is restored either.

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Browse every supported format pair — pre-configured and ready to go.

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