Why convert BMP to PNG?

PNG uses lossless compression, so files are much smaller than BMP while maintaining identical quality. PNG also adds transparency support and is universally web-compatible.

No. PNG is lossless — every pixel is preserved exactly as in the original BMP. You only gain smaller file size and broader compatibility.

How much smaller will files be?

PNG files are typically 50–80% smaller than the equivalent BMP, depending on image content. Graphics with large flat-color areas compress best.

Yes. Select or drop multiple BMP files and they'll all be converted at once.

Will files be uploaded?

No. Everything happens in your browser. Nothing is sent to any server.

BMP (Bitmap) is a legacy Windows format that stores image data with little compression, producing large files. Converting to PNG keeps the image lossless while dramatically reducing file size.

Why choose PNG over BMP?

PNG is lossless like BMP but uses efficient compression, so files are much smaller at identical quality. PNG is also supported everywhere on the web — where BMP is not — and additionally supports transparency.

Does converting add transparency to my image?

No. Conversion cannot invent transparency that was never there — a BMP has no alpha channel, so the PNG looks identical with a solid background. PNG simply supports transparency for images that already contain it.

BMP to PNG

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Max 50.0 MB per file·Supports: BMP

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How BMP to PNG conversion works

BMP stores raw uncompressed pixel data, making files unnecessarily large. PNG uses lossless compression to significantly reduce file size without losing a single pixel of quality. FileKit decodes BMP images in your browser and re-encodes them as PNG. The result is typically 50–80% smaller while being pixel-for-pixel identical. Everything runs locally on your device.

How to Convert BMP to PNG

1
Upload BMP images
Drag and drop .bmp files into the upload area, or click to select.
2
Convert
Files are instantly processed with lossless compression — no quality settings needed.
3
Download PNG files
Download individually or as a ZIP. Files will be significantly smaller than the originals.

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FileKit processes every file directly in your browser using JavaScript and WebAssembly. Your documents, images, and data never leave your device — there is no server upload, no cloud storage, and no account required. What happens in your browser stays in your browser.

100% client-side processing
No server upload — ever
No account or signup needed
Works offline after first load

BMP to PNG

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