PICT to HRZ Converter

Free PICT to HRZ conversion — online image tool

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Any Device Works

Run the PICT to HRZ converter from a desktop, laptop, tablet, or phone — all you need is a web browser and internet access.

Batch Convert

Have multiple PICT files? Upload them all at once and convert the entire batch to HRZ in a single session — saves significant time.

Browser-Based

No software to download or install. The entire PICT to HRZ conversion runs in your web browser — open the page and start converting.

How to convert PICT 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

PICT is a metafile graphics format created by Apple Computer as the native graphics format for the Macintosh, debuting alongside the original Mac in January 1984 and remaining central to Mac OS graphics until the transition to Mac OS X. PICT files record a series of QuickDraw operation codes (opcodes) that reproduce the image when replayed through the QuickDraw graphics engine: operations for drawing lines, arcs, rectangles, rounded rectangles, ovals, polygons, regions, text strings, and pixel maps (bitmaps). This opcode-based approach means PICT files are not simply pixel grids but rather programmatic descriptions of how to draw the image, combining resolution-independent vector elements with pixel data in a unified stream. The PICT 2 revision, introduced with the Macintosh II and Color QuickDraw in 1987, extended the format to handle 24-bit color, multiple pixel depths, extended color spaces, and embedded JPEG and PackBits compressed data. PICT was integral to the Macintosh user experience: system clipboard operations (Copy/Paste), screen capture, printing, and inter-application data exchange all used PICT as the common visual representation. One advantage is historical comprehensiveness: PICT files from the classic Mac era capture both the visual output and the drawing methodology of Mac applications, preserving not just the image but the QuickDraw operations that produced it — valuable for understanding the visual computing paradigm of early Macintosh software. The format's extensive use in desktop publishing during the DTP revolution of the late 1980s provides another dimension of historical importance. PICT files are readable by macOS Preview, ImageMagick, XnView, LibreOffice, and GraphicConverter.
Developer: Apple Computer
Initial release: 1984
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 PICT to HRZ?

PICT files from legacy Mac documents are inaccessible on modern systems. Converting to HRZ makes them usable on Windows, macOS, and Linux.

What software opens HRZ?

Slow-scan television (SSTV) software, GIMP, and amateur radio image tools like MMSSTV and QSSTV.

Are colors preserved during conversion?

Color data from the PICT file is mapped accurately into HRZ. The conversion maintains the original color profile as closely as the target format allows.

Where can I upload PICT files from?

You can upload from your local device, Google Drive, Dropbox, or paste a direct URL. Convertio pulls the PICT file from any of these sources.

Is the original resolution preserved?

Yes — the pixel dimensions of your PICT image are maintained in the HRZ output. No downscaling or cropping happens during conversion.

Is it safe to upload PICT files?

Convertio deletes uploaded files immediately after conversion. Converted output is removed from servers within 24 hours for your privacy.