BMP to PNG Converter
Repackage BMP bitmaps as PNG for a smaller, lossless file.
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Accepted: .bmp,image/bmp · Max 24 MB
Results
About this tool
PNG offers the same pixel fidelity as BMP but adds sensible lossless compression, so the file typically becomes significantly smaller with no visible change. That makes PNG a better home for BMP screenshots, diagrams, and graphics you want to keep exact. This converter reads the BMP in the browser and writes a PNG copy, preserving every pixel of the source. Standard BMPs have no alpha channel, so the PNG output will not gain transparency. Processing happens locally, one file at a time, up to roughly 25MB.
FAQ
No. PNG is a lossless format, so pixels match the source BMP.
PNG applies lossless compression, whereas BMP typically stores pixels raw.
No. Everything runs inside your browser tab.
Only if the BMP had an alpha channel, which most BMPs do not.
More about this tool
How it works
- Select a BMP file to convert.
- The browser encodes the bitmap losslessly as PNG.
- Download the resulting PNG to your device.
Features
- Lossless throughout — The PNG matches the BMP pixel for pixel.
- Smaller than the BMP — PNG's lossless compression usually cuts file size noticeably.
- No new transparency — Standard BMPs are opaque, and the PNG output reflects that.
- On-device — The BMP never leaves your browser.
- One at a time — Handle a single file per conversion, capped near 25MB.
Supported formats
Input: BMP. Output: PNG.
Input
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BMP bmp
Output
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PNG png
Common uses
- Screenshots from legacy tools — BMP-based screenshot exports become portable PNGs.
- Diagrams and UI graphics — Keep sharp-edged content crisp while reducing file size.
- Long-term storage — Archive lossless images in a format most tools still support natively.
Limitations
- No transparency is created — standard BMPs are fully opaque.
- Very large BMP scans may exceed the ~25MB per-file limit.
- One file at a time.
- PNG is still bulkier than lossy formats like JPG or WebP.