How to Convert PGM to HRZ — Quick & Free
Fast, instant PGM to HRZ conversion. No signup required. Just drop your .pgm file and get .hrz in seconds.
Batch Settings
About PGM to HRZ Conversion
Short answer: yes, you can convert PGM to HRZ online for free, and quality is well preserved with the right settings. Just upload your .pgm file to CocoConvert, pick HRZ as the output, and click Convert. The whole process takes seconds.
Now for the details. PGM is a widely used file format. HRZ is a widely used file format. Converting between these two formats lets you convert between formats quickly.
Your PGM file is decoded and re-encoded as HRZ. Converting PGM to HRZ maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert runs entirely online — no software to install, no account to create. Your files are encrypted during upload (TLS), processed on isolated servers in Germany, and permanently deleted after 24 hours. It works in Chrome, Safari, Firefox, Edge, and all mobile browsers.
Need to convert more than one file? Free users can do 5 per hour. Pro gets 100 per hour with files up to 5 GB each.
How to Convert PGM to HRZ
- 1
1. Upload PGM
Drop your .pgm file onto the page (or tap "Browse" on mobile). Add multiple files for batch conversion.
- 2
2. Select HRZ
Choose .hrz from the output dropdown. Settings are pre-configured for best results.
- 3
3. Convert
One click. The server handles all the heavy lifting using FFmpeg and Sharp.
- 4
4. Download
Your .hrz file is ready. Download it directly or get all files as a zip archive.
What Happens When You Convert PGM to HRZ
Your PGM file is decoded and re-encoded as HRZ.
Your PGM file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in HRZ format
The converted file is ready for download
Format Comparison
PGM
.pgm file
| Extension | .pgm |
| MIME Type | image/x-portable-graymap |
| Category | Image |
HRZ
.hrz file
| Extension | .hrz |
| MIME Type | image/x-hrz |
| Category | Image |
Should You Convert PGM to HRZ?
When to Convert
- ✓When you need a HRZ file
Frequently Asked Questions
Is PGM to HRZ conversion free?
Yes. CocoConvert offers free PGM to HRZ conversion with generous daily limits — 25 minutes of processing time and up to 5 files per hour (250 MB each). Pro plans remove these limits.
How fast is PGM to HRZ conversion?
Most files convert in 2–10 seconds depending on size. Large image files may take 30 seconds. Batch jobs process in parallel for maximum speed.
What happens to my files after conversion?
Your uploaded PGM file and the converted HRZ file are both automatically deleted from our servers within 24 hours. They are never shared, sold, or analysed.
Does converting PGM to HRZ lose quality?
Converting PGM to HRZ maintains high quality with CocoConvert's optimised encoder settings.
Can I convert HRZ back to PGM?
Yes, CocoConvert supports HRZ to PGM conversion as well. However, if the original conversion involved lossy compression, converting back won't recover the lost data.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.