BMP to PNG Converter
Convert BMP images to lossless PNG format. Free, instant, and 100% private — all processing happens in your browser.
Want to shrink an unwieldy BMP file without losing a single pixel? PNG uses lossless compression to store the same data in a fraction of the space — typically 60–80% smaller than BMP — while remaining universally compatible with every image tool. You will most often encounter BMP files as screenshots saved by older Windows tools and legacy line-of-business apps, exports from scanners, fax software, and industrial imaging hardware, icon and resource files in classic Windows applications, and PNG is the obvious destination when your goal is design workflows. Converter.Plus runs the whole BMP→PNG conversion locally in your browser — there is no upload, no signup, no watermark, and no per-file size cap. Drop a single file or a whole batch and grab the results as individual downloads or a single ZIP.
Drop BMP files here
or click to select from your device
Drag up to 50 files·or a .zip of images
How to convert BMP to PNG
- Open the BMP to PNG converter: Go to converter.plus/bmp-to-png in any modern browser on your computer or phone.
- Add your BMP files: Drag and drop your BMP files onto the upload area, or click it to browse your device and select them.
- Choose output format and quality: The output is pre-set to PNG for lossless conversion. No format selection needed.
- Click Convert: Click the Convert button. Converter.Plus processes all files instantly in your browser — no upload or waiting required.
- Download your PNG files: Download each converted image individually, or click Download All to save a ZIP archive containing all converted files.
Why use this BMP to PNG converter
- ✓100% private — your BMP files are converted in your browser and never uploaded to a server.
- ✓Free with no signup, no watermark, no per-file size limit, and no daily quota.
- ✓Lossless PNG output preserves every pixel of the original BMP exactly, with full transparency support.
- ✓Batch ready: drop dozens of BMP files at once and download them individually or as a single ZIP.
- ✓Works offline once the page has loaded — the conversion code is cached as a Progressive Web App.
- ✓No tracking pixels and no ad-personalisation cookies on the conversion result page.
About BMP → PNG conversion
Want to shrink an unwieldy BMP file without losing a single pixel? PNG uses lossless compression to store the same data in a fraction of the space — typically 60–80% smaller than BMP — while remaining universally compatible with every image tool.
Bitmap Image File (BMP) was introduced by Microsoft alongside Windows in the late 1980s. BMP stores raw, uncompressed pixel data in a simple, well-documented header. That made it trivial for any Windows program to read or write — but it also means BMP files are enormous compared to any modern compressed format, often dozens of megabytes for a single screen-sized image. You will most often encounter BMP files as screenshots saved by older Windows tools and legacy line-of-business apps, exports from scanners, fax software, and industrial imaging hardware, icon and resource files in classic Windows applications.
BMP files are so large that they choke email attachments, slow uploads, and waste cloud storage. They also have inconsistent support outside Windows — many phone galleries and web tools refuse them outright. That is the friction this converter removes — by producing a clean PNG you can drop into any PNG workflow without surprises.
About BMP to PNG Conversion
Want to shrink an unwieldy BMP file without losing a single pixel? PNG uses lossless compression to store the same data in a fraction of the space — typically 60–80% smaller than BMP — while remaining universally compatible with every image tool.
Bitmap Image File (BMP) was introduced by Microsoft alongside Windows in the late 1980s. BMP stores raw, uncompressed pixel data in a simple, well-documented header. That made it trivial for any Windows program to read or write — but it also means BMP files are enormous compared to any modern compressed format, often dozens of megabytes for a single screen-sized image. You will most often encounter BMP files as screenshots saved by older Windows tools and legacy line-of-business apps, exports from scanners, fax software, and industrial imaging hardware, icon and resource files in classic Windows applications.
BMP files are so large that they choke email attachments, slow uploads, and waste cloud storage. They also have inconsistent support outside Windows — many phone galleries and web tools refuse them outright. That is the friction this converter removes — by producing a clean PNG you can drop into any PNG workflow without surprises.
PNG is the lossless web standard since 1996. PNG preserves every pixel and supports a full alpha channel, making it the default for graphics, screenshots, and any image you intend to keep editing. It is the obvious destination when your goal is design workflows and transparency.
Almost any conversion target will shrink a BMP by 90% or more without visible quality loss, making this one of the highest-impact conversions you can do. Choose PNG when pixel-perfect accuracy or transparency matters more than file size. Converter.Plus handles the entire BMP→PNG pipeline locally in your browser using modern WebAssembly and Canvas APIs — your files never leave your device, there is no signup, no watermark, and no per-file size cap. Drop a single image or a whole batch and grab the results as individual downloads or a single ZIP.
Frequently Asked Questions
What is BMP?
Microsoft's uncompressed bitmap format used since the 1990s. Stores raw pixel data so files are very large but open natively in any Windows tool.
Why convert BMP to PNG?
PNG is a lossless format that preserves every pixel exactly. This is ideal when you need perfect accuracy — for graphics, screenshots, logos, or images you plan to re-edit. Unlike JPG, PNG supports transparency too.
Related Free Converters
Privacy & trust
- •Your BMP stays on your device. Conversion runs locally via the browser's Canvas, WebAssembly, and image-decoding APIs.
- •No account, no email, no payment information collected — Converter.Plus is free for personal and commercial use.
- •No watermarks, no upsells inside the converted PNG, and no compression caps on the output file.
- •Open-source build pipeline — every release is reproducible from the public source and pinned dependencies.