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Convert a BMP Image to PNG, Free

Convert a bitmap (.bmp) image to lossless PNG.

Most tools run entirely on your device

Select an image

Click to choose, or drop a file here

You can also paste (Ctrl+V / Cmd+V)

Most tools run entirely on your device

About converting BMP to PNG

Converting a BMP to PNG swaps an old, uncompressed Windows format for a modern lossless one that's actually compressed and near-universally supported — no quality lost, meaningfully smaller file.

The image is decoded and re-encoded as PNG on a canvas, entirely in your browser, with a genuine reduction in file size from PNG's compression working on data BMP stores completely uncompressed.

Supported files

Accepts BMP images. Produces a .png image, typically smaller.

Is my file uploaded?

No. The BMP is decoded and re-encoded as PNG entirely in your browser on a canvas — it's never uploaded.

How to BMP to PNG

  1. 1

    Add the BMP file

    Drop in the uncompressed .bmp — it's decoded in your browser, never uploaded.

  2. 2

    Convert

    It's re-encoded as PNG, losslessly compressed down from the uncompressed BMP.

  3. 3

    Download

    Save the PNG.

BMP to PNG — frequently asked questions

Is the file uploaded?+

No — the BMP is decoded and re-encoded as PNG entirely in your browser.

Any quality loss?+

No, PNG is lossless.

Is there a free BMP to PNG converter online?+

Yes — this tool decodes and re-encodes the BMP as PNG entirely in your browser, free and with nothing uploaded.

How much smaller is the PNG than the BMP?+

Often significantly smaller, since BMP stores every pixel with no compression at all, while PNG compresses losslessly.

Do you upload my files to a server?+

No — every tool here processes your files entirely on your device, and nothing is uploaded to a server. The only exception is the AI tools, which send the extracted text (not the file) to Claude to do their work.

Is there a file size limit?+

There's no artificial limit we impose, but since processing happens in your browser, very large files (500+ MB or 1,000+ pages) are limited by your device's memory rather than by us.