Convert BMP to PNG
BMP files still fall out of old Windows software, scanners, and lab equipment — uncompressed, enormous, and awkward to email or upload. PNG stores the identical pixels losslessly at a fraction of the size, making it the natural upgrade. The conversion is performed in your browser.
Content last reviewed 2026-07-14.
Preconfigured for BMP input — other formats work too.
Converting to PNG: Lossless format with full transparency — ideal for graphics, logos and screenshots.
or drag & drop images here, or paste from your clipboard
PNG, JPG, WebP, AVIF, GIF, BMP, TIFF, HEIC, SVG
How it works
- 1
Add BMP files
Drop, pick or paste — batch conversion is supported.
- 2
Convert the files
Each file is decoded and re-encoded as PNG in your browser.
- 3
Adjust if needed
Lossless output — no quality settings needed.
- 4
Download
Single files or everything as a ZIP.
Why convert BMP to PNG?
- Identical image, much smaller file — PNG's lossless compression does what BMP never bothered to.
- PNG is welcome everywhere on the web, while .bmp uploads are frequently rejected.
- Zero quality risk: both formats are lossless, so the conversion is pixel-perfect.
- Free, with no watermarks or sign-up.
Good to know
- This is a lossless-to-lossless conversion: every pixel value in the PNG matches the BMP exactly.
- Size reductions are substantial because typical BMPs are stored uncompressed; screenshots and graphics often shrink by 80 percent or more.
- Most BMP files carry no transparency, so the PNG will be fully opaque, just like the original.
- There's no quality setting to worry about — lossless formats don't trade quality for size.
Frequently asked questions
Is any quality lost converting BMP to PNG?
None. Both formats store exact pixel values, so the PNG is a perfect, bit-for-bit faithful copy of the image — just compressed far more sensibly.
How much smaller will the PNG be?
It depends on the image content, but because BMPs are typically uncompressed, reductions of 50 to 90 percent are common. Flat-color images like screenshots and diagrams compress best; noisy photographic content compresses least.
Why are BMP files so large to begin with?
The BMP format usually stores every pixel raw, with no compression at all — a legacy of its origins in early Windows, when simplicity mattered more than size. A 4000 by 3000 image at 24 bits per pixel is about 34 MB as a BMP regardless of what it depicts.
Could I ever need to convert back to BMP?
Rarely — only some legacy software still requires BMP input. Since the conversion is lossless, going PNG to BMP later (with another tool) would reproduce the pixels exactly, so nothing is burned by converting now.
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