HRZ Won't Open? Convert to FITS Instantly
Fast, instant HRZ to FITS conversion. No signup required. Just drop your .hrz file and get .fits in seconds.
Batch Settings
About HRZ to FITS Conversion
Dealing with a HRZ file that won't open on your device? You're not alone — HRZ compatibility issues are one of the most common reasons people search for a file converter. HRZ is a widely used file format.
The fix is simple: convert your HRZ to FITS. FITS is a widely used file format. This conversion lets you convert between formats quickly, solving the problem in seconds rather than hours of troubleshooting.
Converting HRZ to FITS maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your HRZ file on secure servers in Germany — upload, convert, download. Your files are encrypted via TLS and automatically deleted within 24 hours. No account needed, no software to install, and it works on any device with a browser.
This conversion is ideal when you When you need a FITS file.
The conversion engine behind CocoConvert uses FFmpeg, Sharp, and qpdf — the same open-source libraries trusted by Netflix, YouTube, and enterprise platforms. Pro users can batch convert up to 100 files at once.
How to Convert HRZ to FITS
- 1
Add your HRZ file
Drag and drop your .hrz file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick FITS output
Select .fits as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The image engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .fits file. For batch jobs, download all at once as a zip.
What Happens When You Convert HRZ to FITS
Your HRZ file is decoded and re-encoded as FITS.
Your HRZ file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in FITS format
The converted file is ready for download
Format Comparison
HRZ
.hrz file
| Extension | .hrz |
| MIME Type | image/x-hrz |
| Category | Image |
FITS
.fits file
| Extension | .fits |
| MIME Type | image/fits |
| Category | Image |
Should You Convert HRZ to FITS?
When to Convert
- ✓When you need a FITS file
Frequently Asked Questions
Why won't my HRZ file open?
HRZ files may not open if your device lacks the right codec or application. Converting to FITS — a more widely supported format — usually resolves this. FITS is a widely used file format.
Is it safe to convert HRZ to FITS online?
Yes. CocoConvert encrypts your file via TLS, processes it on isolated servers in Germany, and permanently deletes it within 24 hours. Your files are never shared or analysed.
Will I lose quality converting HRZ to FITS?
Converting HRZ to FITS maintains high quality with CocoConvert's optimised encoder settings. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my HRZ file be?
Free users can convert files up to 250 MB each. Pro users get a 5 GB limit per file, and Business API users have custom limits.
Can I convert HRZ to FITS on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.