BMP to PNG Converter
Convert uncompressed BMP files to efficiently compressed PNG images.
Image Converter
Convert images between JPG, PNG, WebP, AVIF, HEIC, JFIF, TIFF, SVG, and more
Why Convert BMP to PNG?
BMP (Bitmap) files store raw pixel data with little or no compression, resulting in very large file sizes. Converting to PNG applies lossless compression that dramatically reduces file size without any quality loss. A 10MB BMP might become a 1-2MB PNG.
Features
100% Private
Files never leave your device. All processing happens in your browser.
Instant Conversion
No waiting for server uploads. Convert BMP to PNG in seconds.
Free & Unlimited
No signup, no limits, no watermarks. Convert as many files as you need.
Batch Support
Upload multiple files and convert them all at once with consistent settings.
Frequently Asked Questions
Does converting BMP to PNG lose quality?
No. PNG uses lossless compression, meaning every pixel is preserved exactly. The image looks identical to the original BMP but in a much smaller file.
How much smaller will the PNG file be?
PNG files are typically 50-90% smaller than BMP files, depending on image content. Simple graphics compress more than detailed photographs. A 10MB BMP can often become 1-2MB as PNG.
Why are BMP files so large?
BMP stores raw, uncompressed pixel data. Every pixel takes 3-4 bytes of storage with no compression applied. This is why even small images can be several megabytes as BMP files.
Will transparency be added during conversion?
If your BMP has an alpha channel (32-bit BMP), it will be preserved in the PNG. Standard 24-bit BMP files have no transparency, and the resulting PNG will also have no transparent areas.
Can I convert multiple BMP files at once?
Yes. Upload all your BMP files and convert them to PNG in a single batch. This is especially useful for reducing storage space when you have many large BMP files.
How It Works
This converter uses your browser's built-in Canvas API to process files locally. Your BMP files are decoded and re-encoded as PNG entirely on your device. Nothing is uploaded to any server.
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