PPS to HRZ Converter

Convert PPS slides to HRZ slow-scan TV images online

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SSTV-Ready Output

PPS slides are converted to the HRZ format used by slow-scan television systems — ready for transmission over amateur radio frequencies.

Cloud-Powered Conversion

Processing runs entirely on Convertio servers. No SSTV software needed on your device — just upload and download through the browser.

Multiple Slides at Once

Upload a PPS presentation and get every slide as a separate HRZ image in a single conversion — no slide-by-slide manual processing.

How to convert PPS to HRZ

1

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

2

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

3

Let the file convert and you can download your hrz file right afterwards

About formats

PPS (PowerPoint Slideshow) is a binary presentation format from Microsoft that functions identically to PPT with one behavioral difference: double-clicking a PPS file launches it directly in slideshow (full-screen) mode rather than opening the editing interface. The format uses the same OLE2 compound document structure as PPT, storing slides, text, images, animations, transitions, speaker notes, and embedded objects in binary streams. PPS files are typically produced by saving a finished PPT presentation in slideshow format, signaling that the content is intended for viewing rather than editing — though the file can still be opened for editing through PowerPoint's File menu. The format gained widespread use in corporate environments for distributing ready-to-present slide decks, training materials, kiosk displays, and self-running presentations. One advantage is presentation-ready behavior — recipients can launch a PPS file and immediately begin presenting without navigating editing tools, reducing the chance of accidentally modifying content or revealing speaker notes. The auto-play capability is another strength for unattended scenarios: combined with automatic timing and looping features, PPS files power information kiosks, digital signage, and lobby displays that run continuously without operator interaction. While the newer PPSX format has superseded PPS for current workflows, the binary slideshow format remains encountered in archived corporate materials and legacy presentation libraries.
Developer: Microsoft
Initial release: 1995
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

Frequently Asked Questions

Why convert PPS to HRZ?

HRZ is used in slow-scan television (SSTV) for transmitting images over radio frequencies. Converting PPS slides to HRZ prepares them for amateur radio image transmission.

What opens HRZ images?

SSTV software like MMSSTV and QSSTV handles HRZ files. ImageMagick and specialized amateur radio tools also process this format.

What resolution does HRZ use?

HRZ images are typically 256x240 pixels — the standard resolution for SSTV transmission. Slides are scaled and cropped to fit this format.

Is HRZ a color format?

Yes — HRZ stores RGB color data at 256x240 resolution, suitable for the color SSTV modes used in amateur radio communication.

Is PPS to HRZ conversion free?

Standard conversions are free. Premium plans handle larger presentations and batch processing.

Who uses HRZ format today?

Amateur radio operators use HRZ for sending images via SSTV during contests, emergency communications, and recreational ham radio transmissions.