Convert BMP to PNG
Convert BMP bitmap images to lossless PNG format instantly in your browser. No upload, no registration — perfect for converting legacy Windows bitmap files.
Drag & drop files here, or click to browse
Accepts: BMP
Batch conversion supported — add multiple files at once
Private & Secure
Files never leave your device. All processing happens locally in your browser.
Completely Free
No subscription, no watermarks, no file limits. Free forever.
Batch Conversion
Convert dozens of files at once with individual progress tracking.
Lightning Fast
Powered by your device's hardware. No server round-trips.
What is Convert BMP to PNG?
Our BMP to PNG converter transforms Windows bitmap images into the universally supported PNG format directly in your browser. BMP files are typically much larger than necessary because they store raw, uncompressed pixel data. Converting to PNG achieves lossless compression — meaning no quality loss — while dramatically reducing file size.
PNG is supported by every modern browser, image editor, and operating system, making it the ideal replacement for BMP in virtually every use case.
How to Calculate
- Drop your BMP file(s) into the converter or click to select them
- Click Convert to process — conversion happens instantly in your browser
- Download your optimized PNG file(s)
Key Benefits
- Significantly smaller file size than BMP with zero quality loss
- Full transparency support — unlike BMP
- Universally compatible with all browsers and software
- 100% private — files never leave your device
- Batch process multiple files at once
Common Use Cases
- Converting legacy Windows screenshots to shareable PNG
- Reducing file size of scanned documents saved as BMP
- Preparing images for web publishing
- Archiving old BMP graphics in a more efficient format
Key Terms Explained
- BMP (Bitmap)
- An uncompressed raster image format native to Windows that stores pixel data directly without compression
- PNG (Portable Network Graphics)
- A lossless compressed raster image format that supports transparency and is widely used on the web
Pro Tips
- PNG is ideal when you need lossless quality; use JPG for photos where some compression is acceptable
- BMP files often have very large file sizes — PNG will typically reduce them by 70-90%
- For web use, consider also converting to WebP for even smaller file sizes
What is BMP?
BMP is an uncompressed raster image format native to Windows. Each pixel is stored as raw color data, resulting in large file sizes but zero quality loss.
What is PNG?
PNG is a lossless compressed image format that supports alpha transparency. It is widely used for web graphics, screenshots, and any image where quality preservation is critical.
Frequently Asked Questions
Is BMP to PNG conversion lossless?↓
Yes. PNG is a lossless format, so your image quality is fully preserved during conversion.
Can I batch convert multiple BMP files?↓
Yes. Drop multiple BMP files and all will be converted simultaneously.
Why convert BMP to PNG?↓
PNG offers significantly better compression than BMP while remaining lossless, resulting in much smaller files without quality loss.
Are my files uploaded to a server?↓
No. All conversion happens in your browser using the Canvas API. Files never leave your device.