BMP · Windows Bitmap

Convert BMP to WebP online

BMP files are uncompressed: every pixel is stored raw, which is why a simple screenshot can weigh 5–10 MB. WebP encodes the same image with intelligent compression, routinely shrinking BMPs by 95% or more. Drop your bitmap below and get a web-ready WebP instantly.

Convert BMP to WebP

Select BMP imagesFree plan converts one image at a time. Files never leave your device.

Drop an image here or click to browse

Compression quality80% is the sweet spot for photos. Use 90%+ for graphics with text.

80%

Maximum widthLarger images are scaled down to this width. Smaller images are never upscaled.

Width in pixels

Why convert BMP to WebP?

95%+ smaller. BMP stores raw pixels; WebP compresses them intelligently.

Web compatible. BMP is not reliably displayed by browsers or accepted by most CMS platforms; WebP is.

Same visual result. At 90% quality, a WebP is indistinguishable from the uncompressed bitmap.

Legacy rescue. Perfect for old Windows Paint exports, scanner output and screenshot archives.

How to convert BMP to WebP

Step 1

Select your BMP files

Click the drop zone or drag and drop your BMP images. Files stay on your device; nothing is uploaded.

Step 2

Choose quality and size

Move the quality slider (80% is ideal for most images) and set a maximum width to downscale oversized images.

Step 3

Convert to WebP

Press "Convert to WebP". Your browser encodes each BMP to WebP in a fraction of a second.

Step 4

Download

Download each WebP file, or grab the whole batch as a ZIP with PRO.

Why BMP files are so large

The Windows Bitmap format dates back to the earliest versions of Windows and, in its common form, applies no compression whatsoever. A 1920×1080 24-bit BMP is always about 6.2 MB regardless of content. That is fine for a program writing to the screen, but hopeless for the web, email or cloud storage.

Best settings for BMP to WebP

Because bitmaps are pristine sources, you have headroom. Photographic bitmaps look perfect at 80%; screenshots and diagrams should use 88–95% to keep text razor sharp. Combine with a sensible maximum width and a 6 MB bitmap becomes a 60 KB WebP.

Image	BMP size	WebP size (q85)
1920×1080 screenshot	6.2 MB	120 KB
1600×1200 scanned document	5.8 MB	260 KB
800×600 diagram	1.4 MB	22 KB

BMP to WebP: questions

Yes. Chrome, Edge, Firefox and Safari all decode BMP files, so the conversion works in any modern browser without plugins.

WebP is lossy, but at 85–95% quality the result is visually identical to the bitmap at normal viewing sizes, for a fraction of the size.

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