HRZ to YUV Converter

Switch from HRZ to YUV seamlessly online

Drop files here. 1 GB maximum file size or Sign Up
to
Facebook Amazon Microsoft Tesla Nestle Walmart L'Oreal

Universal Access

Convert niche HRZ data into standard YUV that opens on any device. Bridge the gap between specialized and mainstream formats effortlessly.

Effortless Conversion

Upload your HRZ, pick YUV, and click Convert — the entire process takes just a few clicks with no technical expertise required.

Privacy Protected

Uploaded HRZ data is erased immediately after conversion. YUV results are purged within 24 hours — your content stays confidential.

How to convert HRZ to YUV

1

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

2

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

3

Let the file convert and you can download your yuv 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
YUV is a raw pixel data format storing images in the Y'UV color model, where image data is separated into a luminance component (Y', representing brightness) and two chrominance components (U/Cb and V/Cr, representing color difference signals). The YUV color model originated with analog color television broadcasting — specifically the NTSC system adopted in 1953 and the PAL system in 1967 — where backward compatibility with existing black-and-white receivers required separating brightness from color information. In digital imaging, the ITU-R BT.601 standard (1982) formalized the digital YCbCr encoding derived from the analog YUV model, defining the conversion matrices and sample precision used by virtually all digital video and broadcast systems. YUV raw files contain no header, compression, or metadata — they are flat sequences of luminance and chrominance samples in a specified ordering (4:4:4, 4:2:2, 4:2:0, or other subsampling ratios), requiring external specification of dimensions, bit depth, and subsampling scheme. The 4:2:0 subsampling mode (where chrominance has half the horizontal and half the vertical resolution of luminance) is particularly common, used by H.264, H.265, AV1, and most consumer video codecs. One advantage is direct video pipeline compatibility: YUV data is the native input format for video encoders, hardware display controllers, and camera sensor ISPs, making raw YUV the most direct representation for frame-accurate video processing and analysis. The perceptual efficiency of the YUV color model is another fundamental strength — separating luma from chroma enables effective subsampling that halves or quarters the color data with minimal visible impact. YUV data is processed by FFmpeg, ImageMagick, and all video processing tools.
Developer: ITU-T (CCIR)
Initial release: 1982

Frequently Asked Questions

Why convert HRZ to YUV?

Raw luminance/chrominance data for video work — converting HRZ to YUV gives your SSTV images broader reach and easier sharing across standard platforms.

What programs open YUV?

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

Can I convert multiple HRZ images at once?

Yes — upload several HRZ images in one session and convert them all to YUV simultaneously. Batch processing saves significant time.

Does the conversion preserve quality?

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

What platforms are supported?

The converter works on any device with a browser — Windows, macOS, Linux, iOS, Android. No platform-specific software needed.

Is the conversion instant?

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