Step 1: Supply your BMP files using the button above or by haul and lay.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Get your converted PNG files.
BMP to PNG Conversion FAQ
Will my PNG have a transparent background?
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BMP files have no alpha channel, so the result will have a solid background. To get transparency in PNG, use the Remove Background tool on the PNG output.
Is the BMP to PNG conversion reversible?
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You can convert the PNG back to BMP on this site. If either format involved is lossy, the round-trip is not bit-perfect even though it is visually or audibly close.
What output quality should I expect from BMP to PNG?
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Default settings target broadcast / web quality — visually identical to the source for most viewers. For archival use, pick the highest quality option in the converter settings.
Can I get transparency once the image is PNG?
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The PNG format supports it, but the conversion cannot invent it. A BMP has no alpha channel, so every pixel including the background arrives fully opaque. Run /removebackground/ afterwards to cut the subject out — then the alpha channel PNG provides has something to store. PNG is the right choice for screenshots, logos, line art and anything with hard edges or transparency — no ringing, no colour banding.
Is there a file-size limit when converting BMP to PNG?
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Free conversions have a size limit per file, set by the type of file, and the page tells you when a file is over it. A paid plan removes that limit, so much larger files can be converted.
Can I batch-convert several BMP files to PNG at once?
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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.
What happens to my BMP files after the conversion?
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Uploaded files are processed on our own conversion servers, nobody looks at them, and they are not shared. The upload and the converted file are both deleted automatically about 24 hours after the conversion, which leaves time to download the result. See /privacy/ for the full policy.
Where can I open a PNG file?
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PNG opens natively in every modern browser, every image viewer, and every photo-editing app. No additional software is needed.
Do I need to install software to convert BMP to PNG?
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No. The converter runs entirely in your browser plus our cloud — no plugin, no install, no admin rights. It works on Windows, macOS, Linux, ChromeOS, iOS, and Android.
Do I need an account to convert BMP to PNG?
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Yes. One conversion an hour is free, with no account needed, for a file within the free size limit. A paid plan removes the hourly limit and the size limit, and lets you add several files to one job.
Is there an API for BMP to PNG conversion?
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Yes. Every conversion this site offers is also exposed via a JSON API — see /api/ for endpoints, authentication, and rate limits. BMP to PNG is one of the supported pairs.
What if my BMP fails to convert to PNG?
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Failures are usually caused by corrupted source files or unsupported BMP variants. Re-export from the original app and try again; if it still fails, the contact page forwards the file to support so we can diagnose.
