WBMP to PNG converter

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Supported image types: WBMP (Wireless Application Protocol Bitmap)
Max file size: 200MB. All uploaded files are automatically deleted 1 hour after upload.

Convert Legacy WBMP Images to Modern Formats

WBMP (Wireless Bitmap) is a relic of the early mobile web. It was part of the WAP (Wireless Application Protocol) standard from the late 1990s, designed for the tiny monochrome screens of early Nokia and Ericsson phones. Each pixel is either black or white — no grayscale, no color, no transparency. The files are tiny by modern standards, but completely unusable in most current software without converting them first.

Why Would I Have a WBMP File?

You might encounter WBMP files if you're:

  • Recovering data from old mobile phones or backup archives from the early 2000s.
  • Working with legacy WAP applications or old CMS systems that generated content for feature phones.
  • Dealing with embedded systems or industrial devices that still use this format for simple displays.
  • Studying or archiving early mobile technology.

Which Output Format Should I Pick?

  • PNG — the best default choice. It's lossless, so the black-and-white pixels transfer perfectly, and every program on every platform can open PNG files. The file will be slightly larger than the WBMP original but still very small.
  • JPEG — works fine, but JPEG is designed for photographs with smooth gradients. For a strictly two-tone image, it doesn't offer any advantage over PNG and may introduce compression artifacts around the edges.
  • GIF — also handles two-color images well and produces very small files. A reasonable choice if you're embedding the image somewhere that specifically expects GIF.

About the WBMP Format

WBMP was defined as part of the WAP 1.0 specification. It uses a simple header followed by raw 1-bit pixel data, with no compression. The format only supports a single image type (Type 0), which encodes pixels row by row, 8 pixels per byte. Because of its extreme simplicity, WBMP files are almost always well under 1 KB. The format never gained traction beyond feature-phone browsers and has been effectively obsolete since smartphones adopted full web browsers around 2007.

Looking for other image converters? Try BMP to PNG for standard Windows bitmap conversion, BMP to JPG, or WebP to PNG for modern web images. See the full list of all available converters.