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How-to GuidePhoto editing≈ 1 minute · no install

How to Convert BMP to PNG

BMP is uncompressed — pixel-perfect but bloated and unwelcome on the web. Converting to PNG keeps every pixel (it is lossless too) at a fraction of the size and adds real transparency. Here is the quick swap.

The short version

Follow the steps below with the free BMP to PNG tool — it runs entirely in your browser, needs no upload, account or watermark, and finishes in about a minute.

Step by step

1
Load the BMP(s)

Drop files in; batch up to 30.

2
Convert to PNG

Lossless re-encode — same detail, much smaller, alpha-ready.

3
Add/keep transparency

BMP masks or removed backgrounds become true PNG alpha.

4
Download

Lean PNGs that load fast and edit cleanly.

Open the BMP to PNG toolFree · unlimited · runs in your browser

Pro tips & common mistakes

  • PNG is the drop-in replacement for BMP anywhere except niche Windows apps.
  • For photos needing tiny size, JPG may beat PNG — but for UI/graphics PNG wins.
  • Batch a folder of legacy BMPs into modern PNGs at once.

Related guides

How to Convert a GIF to a PNG (Still Image)How-to guideHow to Convert TIFF to JPGHow-to guideHow to Make a Transparent PNGHow-to guide

Frequently asked questions

Is PNG lower quality than BMP?
No — both are lossless; PNG just stores the same pixels more efficiently.
Why is my PNG smaller than BMP?
PNG compresses without losing data; BMP is raw and huge.
Does BMP support transparency?
Only a crude mask; PNG has proper alpha — a key reason to convert.