BMP to PNG Converter
Convert BMP images to PNG online for free. Use this converter when you need a lossless image output for editing, screenshots, sharp graphics, or transparent workflows.
Converting BMP to PNG re-encodes the image into the PNG container while preserving resolution and color information. The trade-off depends on the target format: lossy targets (JPG, WebP) shrink file size; lossless targets (PNG, TIFF) preserve every pixel exactly.
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Checking files and selected output formats.
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What to expect when converting BMP to PNG
A 20 MB BMP typically becomes 2 – 10 MB as PNG.
Quality: None — both lossless. PNG preserves every pixel from the BMP exactly, just with efficient compression.
Best for: modernizing legacy BMP images while preserving full quality.
Avoid when: rare — PNG is strictly better than BMP for almost every use case.
Tip: BMP→PNG is one of the safest conversions: lossless, smaller, broader compatibility, supports transparency.
Switch BMP Images to PNG in 3 Steps
Change image format for better compatibility, smaller files, transparency support, or a more web-friendly delivery format.
Drag and drop your BMP files or click to browse. Supports photos, screenshots, graphics, and images with transparency. Batch upload multiple files for bulk conversion.
Our engine converts your BMP to PNG while preserving the original resolution and DPI. Alpha transparency and embedded colour profiles (sRGB, Adobe RGB) are retained where the target format supports them.
Download your converted PNG images individually or as a ZIP archive. Image quality is maintained at the original resolution — no downscaling or watermarks applied.
Why Convert BMP to PNG
PNG is the go-to format for images with transparent backgrounds. Logos, icons, overlays, and UI elements can be placed on any background color or pattern without a white box around them.
PNG compression is completely lossless — every pixel is preserved exactly as the original. No matter how many times you open, edit, and re-save a PNG file, quality never degrades.
Text, code, UI elements, and sharp edges stay crisp in PNG because there are no compression artifacts. Screenshots converted to PNG remain perfectly readable at any zoom level.
PNG is the standard format for website graphics, icons, and illustrations. All browsers render PNG files with full transparency and color accuracy without any plugins or special handling.
PNG supports up to 48-bit true color and 16-bit grayscale, capturing subtle gradients and color transitions that 8-bit formats cannot reproduce. Ideal for medical imaging, scientific data, and professional photography.
BMP vs PNG: Side-by-side
Technical comparison of the two formats — useful for deciding which to use, or for confirming what changes during conversion.
| Property | BMP | PNG |
|---|---|---|
| Full name | Bitmap | Portable Network Graphics |
| Year introduced | 1990 | 1996 |
| Developer / standard body | Microsoft | PNG Development Group / W3C |
| MIME type | image/bmp | image/png |
| File extension | .bmp | .png |
| Compression | Uncompressed (typically) | Lossless (DEFLATE) |
| Color / data depth | 1 to 32-bit | 24-bit truecolor + 8-bit alpha |
| Max dimensions / size | 32,767 × 32,767 px | 2,147,483,647 × 2,147,483,647 px |
| Transparency | Yes | Yes |
| Animation | No | APNG extension only |
| Standard / specification | Microsoft Windows | W3C / ISO/IEC 15948 |
| Best for | Legacy Windows applications, raw pixel data | Logos, screenshots, graphics with transparency or sharp edges |
About the BMP Format
BMP (Bitmap Image File) is a raster image format developed by Microsoft, dating back to 1986. It stores pixel data with little to no compression — each pixel's colour value is written directly into the file, resulting in a faithful but very large representation of the image. While BMP can optionally use RLE (Run-Length Encoding) compression, this is rarely applied in practice, and the format is primarily associated with uncompressed image storage.
BMP is rarely used today for general-purpose imaging due to its extremely large file sizes compared to modern alternatives like PNG or WebP. Its primary remaining use cases are in Windows system resources, legacy desktop applications, and scenarios where raw, uncompressed pixel data is required for processing. BMP offers limited transparency support and no features like animation or metadata. For virtually all modern workflows — web, mobile, print, or archival — other formats provide better compression, features, and compatibility.
BMP to PNG FAQ
Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert BMP files to PNG.
How do I convert BMP to PNG online?
Why would I convert BMP to PNG?
Can I convert BMP to PNG without losing too much quality?
Will converting BMP to PNG keep transparency?
Will converting BMP to PNG change file size?
Will converting BMP to PNG make the file size smaller?
Can I batch convert multiple BMP files to PNG at once?
Is it safe to convert BMP to PNG online?
Guides and Fixes for BMP to PNG Converter
Read image-format guides, transparency tips, compatibility fixes, and file-size advice related to BMP to PNG Converter.
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