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BMP to WEBP Converter

Convert BMP images to WEBP in your browser. Your files stay on your device.

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How to use BMP to WEBP Converter

  1. Drop one or more BMP files into the box, or click to choose them.
  2. Adjust the options that appear, such as quality or background color.
  3. Download each WEBP file, or all of them at once as a ZIP.

About this tool

BMP is an old uncompressed bitmap format that produces large files but is read by almost any program. WEBP is a modern format that supports lossy and lossless compression plus transparency and is usually smaller than PNG or JPEG. Choosing between them depends on where the image will be used: BMP is common for legacy Windows software and simple pixel data, while WEBP suits fast-loading web pages.

WEBP is lossy, so you can set the quality: a lower value gives a smaller file with some loss of detail.

The conversion uses your browser's own image engine, so nothing is uploaded and there is no file size limit beyond your device's memory. Very large images over 100 megapixels are refused to avoid freezing the page.

Frequently Asked Questions

Will I lose quality converting BMP to WEBP?
Some detail is lost because WEBP uses lossy compression. At 90% quality the difference is usually invisible.
Is transparency kept?
BMP has no transparency, so there is none to keep.
Are my images uploaded to a server?
No. The conversion runs entirely in your browser and the files never leave your device.
Can every browser open WEBP?
All current versions of Chrome, Edge, Firefox and Safari support WEBP. Very old software may not.

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