BMP to PNG Converter Free Online - Lossless Shrink
Convert BMP to PNG Free — Lossless Quality, Smaller File
BMP is uncompressed, which means a single bitmap image can be 20–60 MB. PNG uses lossless compression to store the same pixel data in a fraction of the space — often 30–70% smaller — with zero quality loss. Our free BMP to PNG converter runs in your browser with no upload required.
Why PNG Is Better Than BMP for Almost Everything
Smaller files without quality loss: PNG compression cuts BMP sizes by 30–70% while keeping every pixel identical. Transparency support: PNG supports alpha channels; BMP does not. Universal compatibility: Every editor, browser, and platform supports PNG. BMP is rarely accepted outside Windows. Web use: Browsers do not display BMP images inline — PNG works natively on every website.
What Stays the Same
Every pixel is preserved exactly — PNG is lossless. Colors, sharp lines, and text in diagrams or screenshots look identical to the BMP original. There is no quality trade-off.
Runs Locally, No Upload
Your BMP file never leaves your device. Conversion happens in your browser. Free, unlimited, no watermarks.
Frequently Asked Questions
Is PNG better quality than BMP?
They are identical in pixel quality — both formats are lossless. PNG stores the same data more efficiently, so files are smaller without any quality loss.
How much does the file size shrink going from BMP to PNG?
Typically 30–70% smaller. The reduction depends on image content — flat graphics and solid colors compress more than photos.
Can I open the PNG output in Paint, Photoshop, or GIMP?
Yes. PNG is supported by every image editing application on every platform.