Convert BMP to PNG
Convert BMP bitmaps to lossless PNG online free. Same pixels, modern format, far smaller file — no upload.
About the BMP to PNG
PNG wraps your bitmap's exact pixels in compressed, universally supported containers — lossless like BMP, but considerably smaller and safe for the web. Perfect for preserving pixel-exact screenshots.
How it works
The tool re-wraps your bitmap's exact pixels into PNG's lossless, compressed container. Nothing changes visually — PNG's DEFLATE compression simply stores the same data far more efficiently than BMP's raw rows, commonly cutting file size dramatically with zero quality risk.
How to use it
Drop up to 10 .bmp files and convert — no settings to configure. Results preview instantly; download individually or as one ZIP for the batch.
Supported formats & limitations
Accepts .bmp up to 30MB each, 10 per run; output is .png. For screenshots and flat graphics PNG is ideal; for photographs destined to stay small, the BMP→JPG route compresses further at slight (invisible) cost.
Common use cases
Modernizing legacy screenshots, scanner exports and old app output where pixel fidelity matters — documentation archives, patent drawings, medical and lab tooling exports. PNG also unlocks transparency that BMP rarely carried.
Frequently asked questions
Is my image uploaded to a server when I use BMP to PNG?
Everything runs locally in your browser via the Canvas API. Your picture never leaves your machine — there is no upload step at all, so processing is as private as working in an offline editor.
What kind of image files work with this tool?
BMP inputs are supported, up to 30 MB per file. For exotic formats, convert them first with one of the converter tools, then come back.
What are the size and batch limits?
You can queue 10 files per run, each up to 30 MB. Results download individually or bundled as a single ZIP.
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