BMP → PNG
BMP → PNG. Convert images locally, adjust settings and download. Your files stay on this device. Processing happens in your browser.
Enable JavaScript to use the tools. Files are processed in your browser.
How to convert BMP to PNG
Tap the box above and select one or more BMP files.
Adjust the options if you need to.
Each converted image appears below. Tap it to download.
When to convert BMP to PNG
You want smaller files without losing a single pixel, for example for screenshots or pixel art.
Software you use exports BMP but your website or documentation needs PNG.
You need to keep sharp text and lines that JPG would blur.
About BMP
BMP (bitmap) is the original Windows image format. Most BMP files store pixels without compression, so they open almost anywhere but are very large: a single full-HD screenshot can take around 6 MB. Older scanners, industrial software and Windows Paint still produce BMP files, and many websites and email services reject them or limit their size.
About PNG
PNG (Portable Network Graphics) is a lossless format: every pixel is stored exactly, so text, logos, screenshots and diagrams stay sharp no matter how often you save them. It supports full transparency through an alpha channel. The downside is size: a photograph saved as PNG is usually several times larger than the same photo as JPG.
How it works
The page loads the conversion code into your browser: it decodes the image into pixels, then writes it with the browser's image encoder (or packages PNG images inside an ICO file). Conversion does not send the selected images to a conversion server. Closing the tab clears its working data; downloaded files remain on your device. Page, script, advertising or analytics requests are separate from file processing; see Privacy.
Limitations
Your browser decodes the BMP. Common 24-bit and 32-bit BMP files work; rare variants (for example some compressed or 16-bit files) may fail in some browsers.
PNG output is lossless, so files converted from photos are often much larger than the original.
The output is a new image drawn by the browser, so camera metadata (EXIF, such as date and GPS location) is generally not kept, and embedded colour profiles may not be preserved.
How large a file you can convert depends on your device's memory; on phones, convert a few files at a time.
Related tools
WebP → PNG
PNG → JPG
JPG → PNG
HEIC → PNG
AVIF → PNG
SVG → PNG
Frequently asked questions
Is this BMP to PNG converter free?
Yes. It is free with no sign-up, no watermark and no daily limit.
Are my images uploaded?
No. Conversion runs locally in your browser and your images are never sent to a server.
Can I convert several files at once?
Yes. Select multiple files and each one is converted and listed for download.
Why is the converted file bigger or smaller?
BMP and PNG compress images differently. Lossless PNG files are usually larger, while lossy JPG and WebP files are usually smaller; the exact result depends on the picture and the quality setting.
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