Step 1: Provide your BMP files using the button above or by toss and let go.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Fetch your converted PNG files.
BMP to PNG Conversion FAQ
Does BMP to PNG conversion preserve transparency?
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Transparency survives when PNG is PNG, WebP, TIFF, GIF, or SVG. Converting to JPG flattens the alpha channel against a white background — if you need transparency, pick a transparency-aware target instead of PNG. PNG was designed in 1996 as a patent-free replacement for GIF, and became the web’s default lossless image format.
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 /image-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.
What happens to EXIF metadata when converting BMP to PNG?
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In most conversions, camera EXIF fields such as the camera model and GPS position are not carried into the PNG. 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 hundreds of 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.
Are my BMP files private during conversion?
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Yes. Uploaded BMP files are processed on our own conversion servers, no person reviews them, and they are never shared. The upload and the converted PNG are both deleted automatically about 24 hours after the conversion, which leaves time to download the result. See /privacy/ for the full policy.
Why is my converted PNG file bigger or smaller than expected?
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A BMP file with strong compression (heavily lossy JPG) often grows when re-encoded into a lossless PNG (PNG, TIFF), and a high-bitrate lossless BMP often shrinks dramatically when going to JPG/WebP. The ratio depends on the image content (photos compress differently from line-art or screenshots). BMP is gigantic — a 12-megapixel photo is around 36 MB — and no browser treats it as a sane web format. PNG is a poor photograph format: a photo saved as PNG is routinely five to ten times larger than the same image as JPG or WebP.
