What happens to transparent areas when converting PNG to BMP?

BMP has no alpha channel, so transparency cannot be carried over. FileMorf flattens transparent regions onto a clean white background rather than leaving them black, which is what naive converters often produce. If keeping transparency matters, convert to PNG or WebP instead.

More systems than you might expect: legacy Windows applications, embedded devices, receipt and label printers, scientific imaging tools, and some game-modding pipelines. FileMorf writes plain uncompressed 24-bit BMP — the most universally readable variant of the format.

How large will the BMP file be?

Large. FileMorf writes standard uncompressed 24-bit BMP, which needs about 3 bytes per pixel regardless of content — a 4000x3000 image comes out around 34 MB. That is normal for BMP; only use it where a specific application requires the format.

Is my image uploaded to a server?

No. The entire PNG to BMP conversion happens locally in your browser using the Canvas API, so your files never leave your device. There is nothing to upload, no queue to wait in, and nothing for anyone else to store.

Legacy Format Converter

Convert PNG to BMP

Convert PNG images to uncompressed BMP bitmaps for Windows software, embedded systems, and legacy tooling.

This conversion runs in this browser tab. The selected file is not uploaded for processing.

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Drop images to convert

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Convert to WebP, JPG, PNG, and more

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PNG to BMP, step by step.

These steps describe the PNG input and the BMP export for this exact route.

Upload PNG Files

Drag and drop your PNG images or click to browse. You can queue several files at once.

Click Convert

Conversion runs instantly in your browser — nothing is uploaded.

Download BMP

Save the converted file right away. Multiple images are bundled into a ZIP for one-click download.

What to expect

What matters for BMP output.

Review the behavior this PNG to BMP tool is designed to preserve, expose, or simplify.

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All processing happens in your browser. Your files never leave your device.

Standard 24-Bit BMP

Output is plain uncompressed BMP, the exact variant that legacy Windows software and embedded tools expect.

Batch Processing

Convert multiple files at once. Download as a convenient ZIP file.

Questions about PNG and BMP.

Check the format behavior, limitations, and follow-up options before processing a real file.

Some Windows applications, scientific tools, printer utilities, and embedded workflows still expect plain BMP input. BMP stores raw uncompressed pixels, so nothing is lost from the PNG — but there is no transparency, and files grow to roughly 3 bytes per pixel.

Related routes

Continue from BMP.

Choose another format only when it matches the next job.

BMP to PNG PNG to JPG JPG to BMP Browse all conversions

Next step

Ready to process another PNG file?

Start here again, or compare plans when the job needs server capacity, retention, or repeat automation.

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