BMP to PNG Converter
Convert your BMP files to PNG format free, right in your browser — no uploads, no signup, no watermarks. Files never leave your device.
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Quick Answer: How to Convert BMP to PNG
BMP is Windows Bitmap — the raw, uncomplicated pixel grid. PNG is Portable Network Graphics — lossless images with full alpha transparency. Converting between them re-encodes the media with PNG's compression model, so output quality depends on the settings you pick in the converter. Run it free at practicalwebtools.com/convert/image/bmp-to-png: drop in your BMP, adjust settings if you like, and download the PNG — no signup, no upload, everything stays on your device.
How to Convert BMP to PNG Online
- 1
Add your BMP file
Drag and drop it into the converter, or click to browse. BMP files up to the size limit are accepted, and nothing is uploaded — processing runs locally in your browser.
- 2
Set PNG options
Pick your quality: the converter exposes the settings that matter for PNG. Higher bitrates preserve more of the BMP's detail at larger file sizes.
- 3
Download the PNG
Conversion runs on your device. When it completes, download the PNG file — repeat for as many files as you need, free and unlimited.
Key Facts About BMP to PNG Conversion
- BMP: Microsoft/IBM, Windows 1.0 era (1985), usually none — 24-bit BMP is width×height×3 bytes.
- PNG: created 1996 as a patent-free replacement for GIF, lossless DEFLATE — screenshots and graphics compress extremely well.
- BMP strength: trivial to read and write — no decoder needed.
- PNG strength: perfect quality — no generational loss on re-save.
- BMP limitation to know: huge files.
- PNG limitation to know: photographs balloon to 5–10× JPEG size.
BMP vs PNG: Format Comparison
What is BMP?
BMP is an uncompressed raster image format. It produces large file sizes but maintains exact pixel data without any compression artifacts.
- File extension: .bmp, .dib
- Developed by: Microsoft
- Best for: Windows icons, exact pixel data preservation
What is PNG?
PNG is a lossless image format that supports transparency. It is ideal for graphics, logos, and images that require a transparent background.
- File extension: .png
- Developed by: PNG Development Group
- Best for: Graphics, logos, images with transparency
Why Convert BMP to PNG?
- PNG is perfect for graphics, logos, images with transparency
- Web browsers load PNG images faster
- PNG supports features BMP doesn't (transparency, animation)
- Converting to PNG reduces file size for web use
- PNG is required by specific applications or platforms
Frequently Asked Questions
Will converting BMP to PNG lose quality?
It depends on the formats: BMP is usually none — 24-bit BMP is width×height×3 bytes and PNG is lossless DEFLATE — screenshots and graphics compress extremely well. Any step from a lossless source into PNG keeps everything; any lossy step re-encodes and discards some data.
Are my files uploaded anywhere during BMP → PNG conversion?
No. This converter runs on WebAssembly inside your browser — your BMP file is read from disk, processed by your device's CPU, and the PNG is written back locally. There is no server upload at any point, which also means no size-based throttling or waiting in queue.
Does the converter keep metadata (title, artist, cover art)?
Where the PNG container supports it, standard tags are carried across. PNG's "interlaced" option (Adam7) enables progressive loading at 1/64 resolution — obsolete for most uses today, but the option lives on in every save dialog
What PNG settings should I choose?
For screenshots, start with the converter's default preset — it's tuned for the common case. If you need smaller files, step quality down gradually and listen or look at the result before batch-converting everything.