HRZ to WMF Converter

Transform HRZ data into WMF — fast and online

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

Data Safety First

All HRZ uploads are removed after processing. Converted WMF output is deleted within 24 hours to protect your information.

Bulk Conversion

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

Browser-Based Tool

No downloads or installations needed — open the converter in your browser and convert HRZ to WMF instantly from anywhere.

How to convert HRZ to WMF

1

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

2

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

3

Let the file convert and you can download your wmf 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
WMF (Windows Metafile) is a vector graphics format created by Microsoft, introduced with Windows 3.0 in May 1990 as the platform's native format for recording and replaying graphical operations. A WMF file captures a sequence of GDI (Graphics Device Interface) drawing commands — lines, rectangles, ellipses, polygons, text, and bitmap blits — in the order they were issued, serializing screen or printer output into a replayable file. The format uses a 16-bit coordinate space and organizes records as a linear stream of function calls with their parameters, preceded by a header specifying the bounding rectangle and resolution. WMF became deeply integrated into the Windows ecosystem as the default format for clip art collections, Office document graphics, and clipboard vector interchange during the 1990s — Microsoft Office shipped with thousands of WMF clip art images that defined a visual era of desktop publishing. One advantage is pervasive compatibility: virtually every Windows application from the past three decades can render WMF content, making it one of the most widely supported vector formats in existence. The lightweight recording model is another strength — WMF files are compact and render quickly because they replay native system drawing calls rather than interpreting a complex graphics language. While 16-bit limitations and lack of transparency and Bezier curves led Microsoft to develop EMF as a 32-bit replacement, WMF files remain ubiquitous in legacy documents and across current Windows software.
Developer: Microsoft
Initial release: May 22, 1990

Frequently Asked Questions

Why convert HRZ to WMF?

Most people lack software for HRZ. Converting to WMF ensures your SSTV images are viewable everywhere — from phones to desktops.

What programs open WMF?

Open WMF in Illustrator, Inkscape, CorelDRAW, or Affinity Designer. For viewing, many image viewers handle this format.

Can I batch convert HRZ to WMF?

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

What platforms are supported?

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

Will my image lose quality?

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