File Converter

BMP to WebP converter Free, private, no upload.

Convert BMP files to WebP right in your browser. WebP makes images much smaller than JPG or PNG, so websites load faster. Every modern browser supports it. Your files are never uploaded.

or drop files anywhere · paste with Ctrl/⌘ + V

How to convert BMP to WebP

  1. 1 Drop your BMP files onto the page, or click “Choose files”. You can add many at once, or a whole folder.
  2. 2 WebP is already selected as the output. Optionally open Options to adjust quality, lossless, max width.
  3. 3 Click Convert, then Save. Converting several files? Save them all as one ZIP.

About the formats

BMP · Bitmap image

BMP is an uncompressed Windows bitmap format. Files are very large but simple, and are still used by some legacy and embedded software.

WebP · WebP image

WebP is a modern image format from Google that is typically 25–35% smaller than JPG at the same visual quality, with optional transparency.

The conversion runs on your device using jSquash (MozJPEG, OxiPNG, libwebp, libavif and libjxl) compiled to WebAssembly. You can adjust: quality, lossless, max width, max height, rotate, flip.

Frequently asked questions

How do I convert BMP to WebP?

Drop your BMP files onto the page, or click “Choose files”. You can add many at once, or a whole folder. WebP is already selected as the output. Optionally open Options to adjust quality, lossless, max width. Click Convert, then Save. Converting several files? Save them all as one ZIP.

Are my files uploaded to a server?

No. The conversion runs entirely in your browser using WebAssembly. Your files never leave your device, so it is safe for private photos, contracts and business data. Once the page has loaded it even works offline.

Will converting BMP to WebP reduce quality?

WebP uses lossy compression, so some detail is traded for a smaller file. At the default quality the difference is very hard to see or hear, and you can raise the quality setting if you need more.

Can I convert multiple BMP files to WebP at once?

Yes. Add as many BMP files as you like; they are converted in parallel on your device and you can download them all as a single ZIP.

Is it free? Are there limits?

It is free, with no sign-up, no watermark and no daily limits. Because nothing is uploaded there is no upload size limit either; the only limit is your device’s memory, which matters mostly for very large videos.

Why do WebP images not open on my computer?

Older versions of Windows Photo Viewer, Photoshop and some office software cannot read WebP. Converting to PNG or JPG gives you a file that opens everywhere.

See everything the BMP converter and the WebP converter can do.