DJVU to WBMP Converter

Convert DJVU to WBMP — wireless bitmap, free online

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Mobile-Optimized

WBMP is designed for mobile and embedded devices — ultra-compact monochrome images from your DJVU pages.

Instant Processing

WBMP files are tiny — conversion from DJVU is nearly instantaneous thanks to server-side processing.

Secure Conversion

All uploads are deleted after processing and output files are automatically cleaned up within 24 hours.

How to convert DJVU to WBMP

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose wbmp or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your wbmp file right afterwards

About formats

DjVu (pronounced "deja vu") is a document format developed at AT&T Labs by Yann LeCun, Leon Bottou, Patrick Haffner, and Paul Howard, first released in 1996. The format was specifically designed for storing scanned documents and images at very high compression ratios while maintaining visual quality suitable for on-screen reading. DjVu achieves this through a layered approach: the document image is separated into a foreground layer (text and line art at full resolution), a background layer (photographs and textures at reduced resolution), and a mask layer that determines which layer is visible at each pixel. This separation, combined with purpose-built compression algorithms for each layer type, typically produces files 5-10 times smaller than equivalent JPEG or PDF scans. One advantage is exceptional compression on scanned pages — a 300 DPI color scan that might occupy 25 MB as TIFF or 500 KB as JPEG typically compresses to 40-80 KB in DjVu while preserving legible text. The progressive rendering model is another strength: DjVu files stream efficiently over networks, displaying a readable low-resolution version almost immediately while progressively refining to full quality. The format supports multi-page documents, embedded text layers for searchability, hyperlinks, annotations, and a shared dictionary mechanism that further compresses collections of similar pages. DjVu is widely used by libraries and archives for digitized historical documents and manuscripts.
Developer: AT&T Labs
Initial release: 1996
WBMP (Wireless Bitmap) is a monochrome (1-bit, black and white) image format defined as part of the Wireless Application Protocol (WAP) specification, developed by the WAP Forum (later consolidated into the Open Mobile Alliance) around 1998. The format was designed for the extremely constrained mobile devices of the late 1990s and early 2000s — phones with small monochrome screens, minimal processing power, and narrow bandwidth GSM data connections. WBMP uses the simplest possible encoding: a type identifier byte (always 0 for the only defined type), width and height encoded as multi-byte integers using a variable-length scheme, and the raw pixel data where each bit represents one pixel (0 for white, 1 for black) packed eight per byte. There is no compression, no metadata, and no color — the format is purely a minimal container for delivering small monochrome graphics to WAP-era mobile browsers. One advantage was extreme efficiency on constrained devices — WBMP images could be decoded with virtually zero CPU overhead and minimal memory, critical on early mobile hardware running at single-digit megahertz clock speeds. The tiny file sizes are another strength: a typical WBMP icon occupied just a few hundred bytes, practical for transfer over 9.6 kbps GSM data channels. While the WAP ecosystem has been entirely superseded by modern mobile web browsers capable of rendering full-color JPEG, PNG, and WebP images, WBMP files remain encountered in archived mobile content from that transitional era.
Developer: WAP Forum
Initial release: 1998

Frequently Asked Questions

What is WBMP format?

WBMP (Wireless Bitmap) is a monochrome image format designed for mobile devices and WAP browsers.

What opens WBMP files?

GIMP, IrfanView, and some mobile browsers support WBMP. It is primarily used in legacy mobile applications.

Why convert DJVU to WBMP?

WBMP is needed for legacy mobile platforms or embedded systems that only support monochrome bitmap images.

Is this free?

Yes — DJVU to WBMP conversion is free. Premium accounts offer extended limits for frequent conversions.

Is WBMP color or monochrome?

WBMP is strictly monochrome (black and white) — it does not support grayscale or color image data.

How fast is the conversion?

Very fast — monochrome bitmap generation is lightweight and completes in seconds on cloud servers.

DJVU to WBMP Quality Rating

5.0 (2 votes)
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