Step 1: Attach your PNG files using the button above or by bring and position.
Step 2: Click the 'Optimize' button to start the optimization.
Step 3: Collect your converted BMP files.
PNG to BMP Optimization FAQ
Will BMP actually be smaller than PNG?
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Almost always when going from PNG / JPG / TIFF into WebP or AVIF: expect 25-50% smaller than JPG at the same visual quality, 60-90% smaller than PNG. Going the other way (WebP / AVIF back to BMP = PNG / JPG) typically grows the file because you are leaving a more modern codec for an older one — useful for compatibility, not size.
Does PNG to BMP preserve transparency / alpha?
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Transparency survives when BMP supports alpha (PNG, WebP, AVIF, GIF, TIFF, SVG). Converting to JPG flattens the alpha channel onto white — if you need transparency on the modern web target WebP or AVIF instead of BMP.
Will the BMP version look identical to the PNG on a Retina display?
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At quality 80+ on WebP / AVIF the difference is invisible to anyone but a trained eye even at 3x device pixel ratio. Photos compress slightly more visibly than line art; if your PNG is screenshots or UI mockups, push quality to 90 or use a lossless BMP.
Will EXIF camera metadata survive PNG to BMP?
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Usually not. In most conversions, camera EXIF fields such as the camera model and GPS position are not carried into the BMP. There is no setting on this page to keep or remove metadata, so check the result with a metadata viewer if it matters.
Can I batch convert a folder of PNG files to BMP?
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Several files in one job need a paid plan. Free use is one file per conversion, one conversion an hour. On a paid plan you can add several files to one job, then download each result on its own or all of them in one ZIP.
Are my PNG files private during BMP conversion?
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Yes. Uploaded PNG files are processed on our own conversion servers, no person reviews them, and they are never shared. The upload and the converted BMP are both deleted automatically about 24 hours after the conversion, which leaves time to download the result. See /privacy/ for the full policy.
How do I serve the BMP with a PNG fallback on my site?
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Use a `<picture>` element: `<picture><source srcset="image.BMP" type="image/BMP"><img src="image.PNG" alt=""></picture>`. Browsers that understand BMP fetch the smaller file; older browsers fall back to PNG. WebP is supported in 96%+ of installed browsers, AVIF in 90%+.
Why is my BMP file unexpectedly bigger / smaller than I expected?
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A PNG that is already heavily compressed (low-quality JPG) often grows when re-encoded into a lossless BMP (PNG / TIFF). A high-bitrate lossless PNG (PNG / TIFF) often shrinks 60-90% when going to a lossy modern BMP (WebP / AVIF). Image content matters too — photos compress very differently from line art and screenshots.
