Convert PNM to HRZ
Convert PNM images to HRZ format, edit and optimize images online and free.
Drop Files Anywhere to Upload
The PNM which stands for Portable Any-Map is an abstraction of Netpbm PBM, PGM, and PPM formats, designed by Jef Poskanzer in the 1980s. It was designed to easily exchange binary images between different platforms.
The HRZ file extension is integral to Slow Scan Television (SSTV), a digital imaging technique used in amateur radio to transmit images via radio waves. The HRZ format efficiently stores images in a 256 x 240 RGB bitmap, making it ideal for low-bandwidth transmissions. SSTV encodes images into audio signals, which are then decoded back into visual files, producing an HRZ file. This technology is crucial for image communication in bandwidth-constrained environments.
Start uploading a PNM image by clicking the Choose File button or drag & dropping your PNM file.
Use any available PNM to HRZ tools on the preview page and click Convert.
Let the conversion process finish, then download your HRZ image.
To change PNM format to HRZ, upload your PNM file to proceed to the preview page. Use any available tools if you want to edit and manipulate your PNM file. Click on the convert button and wait for the convert to complete. Download the converted HRZ file afterward.
Follow steps below if you have installed Vertopal CLI on your macOS system.
cd to PNM file location or include path to your input file.Follow steps below if you have installed Vertopal CLI on your Windows system.
cd to PNM file location or include path to your input file.Follow steps below if you have installed Vertopal CLI on your Linux system.
cd to PNM file location or include path to your input file.