How do I convert BMP to PNG?

Drop your BMP file onto this page and the PNG version is produced immediately, in your browser. There is no upload, no queue and no account — the conversion runs on your own device using the canvas API.

Does converting BMP to PNG lose quality?

PNG is lossless, so nothing further is discarded during the conversion itself. Anything already lost by BMP's own compression cannot be recovered.

Is my BMP file uploaded to a server?

No. The file is read by your browser, decoded and re-encoded on your device, and handed straight back. Nothing is transmitted, which matters when the image is a document, a screenshot of something private, or a photograph with location data in it.

Why would I convert BMP to PNG?

Lossless, with full alpha transparency. Perfect for screenshots, logos, diagrams and anything with hard edges or flat colour. That is usually the reason. Enormous. A photo that is 2 MB as a JPG can be 30 MB as a BMP, for no visible gain.

BMP to PNG

Convert BMP to PNG in your browser. Free, no upload, no signup.

ImageRuns in your browserFree, no signup

About the BMP to PNG

BMP is Bitmap. Utterly simple and uncompressed, which makes it readable by anything, including very old and very small systems. Enormous. A photo that is 2 MB as a JPG can be 30 MB as a BMP, for no visible gain.

PNG is Portable Network Graphics. Lossless, with full alpha transparency. Perfect for screenshots, logos, diagrams and anything with hard edges or flat colour. Large for photographs — it stores every pixel exactly, and a photograph has no repeating detail to compress.

Both formats store the full image, so this conversion changes the container rather than the picture. File size will differ — that is the point of converting — but nothing visible is discarded.

The whole conversion happens on a canvas in your own browser. The file is read from disk with the File API, decoded, redrawn and re-encoded locally, so it is never uploaded and there is no size limit beyond your device's memory.

How it works

Drop in a BMP file — it is read by your browser, not uploaded.
It is decoded and re-encoded as PNG on your own device.
Download the result. Nothing is stored anywhere.

Frequently asked questions

How do I convert BMP to PNG?: Drop your BMP file onto this page and the PNG version is produced immediately, in your browser. There is no upload, no queue and no account — the conversion runs on your own device using the canvas API.
Does converting BMP to PNG lose quality?: PNG is lossless, so nothing further is discarded during the conversion itself. Anything already lost by BMP's own compression cannot be recovered.
Is my BMP file uploaded to a server?: No. The file is read by your browser, decoded and re-encoded on your device, and handed straight back. Nothing is transmitted, which matters when the image is a document, a screenshot of something private, or a photograph with location data in it.
Why would I convert BMP to PNG?: Lossless, with full alpha transparency. Perfect for screenshots, logos, diagrams and anything with hard edges or flat colour. That is usually the reason. Enormous. A photo that is 2 MB as a JPG can be 30 MB as a BMP, for no visible gain.

Privacy

Everything happens locally. Your files are read by your own browser, processed on your device, and never uploaded — closing the tab is all it takes to erase them.

BMP to PNG

About the BMP to PNG

How it works

Frequently asked questions

Privacy

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