HRZ to TGA Converter

Convert radio-transmitted HRZ images to TGA format online

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No Install Needed

The converter runs entirely in your browser — no desktop software required. Works on all major platforms and devices alike.

Secure Processing

Your HRZ uploads are deleted right after conversion, and the resulting TGA output is removed from servers within 24 hours for full privacy.

Format Flexibility

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

How to convert HRZ to TGA

1

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

2

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

3

Let the file convert and you can download your tga 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
TGA (Truevision Graphics Adapter, also known as TARGA) is a raster image format created by Truevision in 1984 for their line of display adapter cards designed for IBM PC compatibles. The format stores pixel data in a straightforward structure: an 18-byte header specifying dimensions, color depth, and image descriptor flags, optional color map data, and the pixel array in either uncompressed or RLE-compressed form. TGA supports indexed color (8-bit with palette), true color (15-bit, 16-bit, 24-bit), and true color with alpha channel (32-bit), and was one of the first PC image formats to include per-pixel alpha transparency. The format became a staple of the professional graphics industry, widely adopted by video editing suites, 3D rendering software, and game development pipelines throughout the 1990s and 2000s. One advantage is native alpha channel support — TGA was one of the earliest formats offering full 8-bit alpha transparency per pixel, making it the standard output format for 3D renderers and compositing software where layered transparency is essential. The simple, well-documented structure is another strength: TGA files are quick to parse and write, with no complex metadata or container overhead, valued in real-time applications and game engines where loading speed matters. While PNG has largely replaced TGA for general use, the format persists in game development, texture pipelines, and 3D rendering workflows where its simplicity and alpha support remain advantageous.
Developer: Truevision
Initial release: 1984

Frequently Asked Questions

Why convert HRZ to TGA?

HRZ requires niche software to open. Converting to TGA lets you share and view your SSTV images on virtually any platform.

What programs open TGA?

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

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.

Is batch HRZ to TGA conversion supported?

Absolutely — queue multiple HRZ images and convert them all to TGA in a single session. No need to process one at a time.

Will my image lose quality?

Quality depends on the target format. TGA lossless output preserves data within its format constraints — no unnecessary degradation occurs.