HRZ to WBMP Converter

Create WBMP from HRZ with one click online

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Bulk Conversion

Handle many HRZ to WBMP conversions at once. Upload a batch, start the process, and download all results — no repeated uploading.

Format Bridge

Go from specialized HRZ (amateur radio slow-scan television) to universally supported WBMP — making your data accessible to anyone without niche software.

Format Flexibility

HRZ to WBMP conversion opens new possibilities. Use your SSTV images in contexts where WBMP is the expected or required format.

How to convert HRZ 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

HRZ is a simple raster image format associated with slow-scan television (SSTV), a method of transmitting still images over radio frequencies used by amateur radio operators since the late 1950s when Copthorne Macdonald pioneered the technology. HRZ files store images at a fixed resolution of 256x240 pixels in raw RGB format, with each pixel represented as three bytes (red, green, blue) at 8 bits per channel, producing uncompressed files of exactly 184,320 bytes. The format has no header, no metadata, and no compression — the file is simply a sequential dump of raw pixel data in row-major order. This extreme simplicity reflects the format's origins in the amateur radio community, where SSTV images are transmitted as audio tones encoding luminance and chrominance values over narrow-bandwidth HF (shortwave) radio channels. The fixed 256x240 resolution corresponds to common SSTV transmission modes, and HRZ files serve as the digital capture or storage medium for received SSTV transmissions. One advantage is the format's zero-overhead structure: with no parsing, decompression, or metadata processing required, HRZ files can be read by any program capable of reading raw pixel data with known dimensions — a single function call in virtually any programming language. The format's connection to amateur radio SSTV culture is another notable aspect: HRZ files document a unique form of image communication where operators transmit photographs over thousands of miles using nothing but radio waves and audio encoding, a practice that continues today alongside digital modes. HRZ files can be opened by ImageMagick, GIMP, and specialized SSTV software.
Developer: SSTV Community
Initial release: 1985
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

Why convert HRZ to WBMP?

Ultra-small size for mobile and wireless devices — converting HRZ to WBMP gives your SSTV images broader reach and easier sharing across standard platforms.

What programs open WBMP?

Open WBMP with standard tools like Windows Photos, Preview on macOS, GIMP, Photoshop, or any web browser — no special software needed.

Can I batch convert HRZ to WBMP?

Yes — Convertio supports batch uploads. Add multiple HRZ images and convert them all to WBMP at once to speed up your workflow.

Is the conversion instant?

Near-instant for typical images — the cloud-based processing handles HRZ to WBMP conversion quickly. Very large data may take a moment.

Does this work on mobile devices?

Yes — the converter runs in any web browser, so it works on phones, tablets, laptops, and desktops regardless of operating system.

Does the conversion preserve quality?

The converter retains maximum fidelity during the HRZ to WBMP transformation. Any differences stem from the output format's own characteristics.