Do You Need Text Recognition? Recognize text

HRZ to PDF Converter

Produce PDF from HRZ — browser-based converter

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

Cross-Platform

The converter works on Windows, macOS, Linux, iOS, and Android. Convert HRZ to PDF from whichever device you have at hand.

Format Bridge

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

Quick Results

HRZ to PDF conversion is fast — upload, process, and download typically wraps up in under a minute for standard images.

How to convert HRZ to PDF

1

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

2

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

3

Let the file convert and you can download your pdf 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
PDF (Portable Document Format) was developed by Adobe Systems, co-founded by John Warnock and Charles Geschke, with the first version released on June 15, 1993. Built on a simplified PostScript imaging model, PDF encapsulates complete document descriptions — text with fonts, vector graphics, raster images, and interactive elements — in a self-contained file that renders identically across every platform, device, and printer. The format evolved through multiple versions, culminating in its adoption as international standard ISO 32000-1 in 2008 (PDF 1.7) and ISO 32000-2 in 2017 (PDF 2.0), ensuring long-term vendor independence. PDF supports an extraordinary range of capabilities: digital signatures, form fields, annotations, bookmarks, accessibility tags, encryption, JavaScript, multimedia embedding, 3D content, and archival-specific profiles (PDF/A). One advantage is absolute visual fidelity — a PDF document looks exactly the same whether opened on Windows, macOS, Linux, iOS, or Android, printed on any printer, or viewed decades after creation. Universal software support is another core strength: PDF viewers are built into every major operating system and web browser, and the format is read by hundreds of applications worldwide. Specialized ISO profiles like PDF/A (archival), PDF/X (print production), and PDF/UA (accessibility) extend the format's reach into regulated industries. PDF has become the global standard for document exchange in business, government, legal, academic, and publishing contexts.
Developer: Adobe Systems
Initial release: June 15, 1993

Frequently Asked Questions

Why convert HRZ to PDF?

PDF is widely supported across devices and applications — converting from HRZ makes your SSTV images accessible to anyone without specialized tools.

What programs open PDF?

Open PDF with Microsoft Word, LibreOffice Writer, Google Docs, or any modern office application — supported across platforms.

Can I convert on a phone or tablet?

Absolutely — the online converter works in mobile browsers just as well as on desktop. No app installation is required at all.

Can I batch convert HRZ to PDF?

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

Is the conversion instant?

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