Convert WBMP images (WAP/WML) to PNG locally - 1-bit bitmap decoded, no upload, in your browser.
Running locally on your device ...
Running locally on your device ...
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No re-upload neededThese tools accept .PNG - your file is handed over directly.
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
WBMP (Wireless Bitmap) comes from the WAP/WML era of early mobile-phone browsers, when networks were slow and displays were tiny and monochrome. The format is deliberately radically simple: a few header bytes plus a pure black-and-white bitmap, one bit per pixel. Modern browsers no longer open WBMP - this tool reads the file with its own decoder and exports a PNG.
The header consists of a TypeField (must be 0 - the only type any real file uses), a FixHeaderField, plus width and height as "multi-byte" integers (every byte contributes 7 bits, the top bit marks a continuation byte). The bitmap itself follows: each row padded to a whole byte, every bit read MSB-first; per the spec 0 means black (a set pixel) and 1 means white.
Other WBMP types (obsolete WAP extensions that never occur in practice) are honestly rejected rather than guessed at. The resulting PNG is always fully opaque and purely black-and-white - WBMP has neither grayscale nor colour nor transparency. The conversion runs entirely locally in the browser, even offline.
You will almost only ever encounter WBMP in old archives, museum emulators or embedded systems that still trace back to that ancient mobile-phone era. As a PNG, such a tiny bit image can finally be viewed and reused with any program again.
| Input formats | WBMP |
|---|---|
| Output format | PNG |
| Batch processing | Yes |
| Processing | Locally in your browser (JavaScript) |
| File upload | None |
Limitations: Only type 0 is supported (the only WBMP variant seen in practice, an uncompressed black-and-white bitmap); other types are honestly rejected. WBMP has neither grayscale, colour nor transparency - the PNG is purely black-and-white and opaque.
No. The conversion runs entirely locally in the browser - even offline.
A tiny 1-bit black-and-white bitmap format from the WAP/WML era of early mobile-phone browsers.
Only type 0 - the only variant real files use. Other, obsolete types are honestly rejected.
No. WBMP is purely black-and-white, one bit per pixel - the PNG stays black-and-white accordingly.
Yes, download individually or as a ZIP.