Convert BMP to PNG — Free, Private, No Upload
Convert BMP images to high-quality PNG format instantly. No upload, batch processing, free.
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How to Convert BMP to PNG
Select your BMP files
Choose files or drag and drop them into the converter. Any image format is accepted.
Convert to PNG
Conversion starts automatically with optimized defaults. Adjust quality in advanced settings.
Download
Download converted files individually or as a ZIP archive.
Why Convert BMP to PNG?
BMP files are uncompressed and take up far more disk space than necessary. Converting to PNG gives you lossless compression — every pixel stays exactly the same, but the file is typically 3–5 times smaller. PNG also adds transparency support that BMP lacks.
PNG is the modern standard for lossless images. It works in every browser, every editor, and every operating system. If you have screenshots, diagrams, or graphics in BMP format, PNG is the natural upgrade with no quality compromise.
LeanImg handles the conversion right in your browser. Your files never leave your device — no upload, no cloud processing, no data collection. Free, instant, and private.
For even smaller files where some quality loss is acceptable, convert to JPG instead. After converting to PNG, you can also compress your PNG for additional optimization while keeping lossless quality.
BMP vs PNG
| Feature | BMP | PNG |
|---|---|---|
| File Size | Very large (uncompressed) | Much smaller |
| Transparency | No | Yes (alpha channel) |
| Compression | None | Lossless |
| Software Support | Windows, legacy | Universal |
| Best For | Legacy systems | Graphics, screenshots |
| Quality | Exact pixels | Exact pixels |
Frequently Asked Questions
How to convert BMP to PNG?
Visit LeanImg in any browser and drop your BMP files into the converter. PNG files are generated instantly on your device. Free, no sign-up, and your images are never uploaded to any server. Batch conversion for multiple files is supported.
Is it safe to convert BMP to PNG online?
Yes. LeanImg converts files locally in your browser. No uploads, no server storage, and your images remain private on your device throughout the process. It is as safe as editing files on your own computer.
How to convert BMP to PNG on Mac?
Open any browser on your Mac and go to LeanImg. Drag your BMP files into the converter and download PNG versions in seconds. No software installation needed. Works in Safari, Chrome, and Firefox on macOS.