Convert BMP to PNG Online
BMP and PNG are both lossless formats — but PNG's compression typically produces files 5–20× smaller, with no quality difference whatsoever.
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Why convert BMP to PNG?
BMP stores pixels uncompressed; PNG applies lossless compression that takes advantage of repeated patterns, color palettes, and predictable pixel relationships. For a typical screenshot or graphic, the PNG version is dramatically smaller without sacrificing any image data — you can convert a BMP back from a PNG and get a bit-identical file.
If your source BMP is a screenshot, line drawing, logo, or any graphic with limited color variation, the PNG conversion will produce a file 90% smaller. For photographic content (someone saved a JPG as BMP at some point), the savings are smaller — perhaps 50–70% — because photos compress less efficiently in lossless modes.
Either way, the result is universally readable: PNG works in every modern application, browser, and operating system, while BMP support is increasingly patchy outside of Windows.
Common use cases
- Compressing legacy BMP screenshots
- Importing BMP graphics into web projects
- Modernizing BMP icon collections
- Archiving BMP sources in a smaller lossless format
How to convert BMP to PNG
- Upload your BMP files — drag and drop into the uploader above, or click to browse. Up to 20 files per batch, 25 MB each.
- Confirm PNG as the output format — the format selector is already pre-selected for this conversion. You can change it before clicking Convert if you change your mind.
- Click Convert — your BMP files are processed on our server in seconds. A progress bar shows live status for each file.
- Download the ZIP — your converted PNG files are bundled into a ZIP for one-click download. Source files are deleted immediately afterwards.
BMP to PNG — Frequently Asked Questions
Is the BMP to PNG converter really free?
Yes — completely free, with no signup, no credit card, no watermarks, and no file count limits. The full feature set is available without any account.
Are my BMP files private?
Yes. Files are stored in a private directory outside the web root, never shared with anyone, and deleted immediately after you download your ZIP.
How many BMP files can I convert at once?
Up to 20 BMP files per batch, with a maximum of 25 MB per file. There are no limits on the number of batches you can run.
Does the converted PNG keep the same image quality?
Yes. PNG uses lossless compression, so every pixel from your BMP source is preserved exactly. The resulting file is bit-for-bit accurate.
Related image conversions
Or browse the full supported conversions matrix on the homepage.