Open .mgz Files Online — Free MGZ Viewer
Open MGZ File Online — Free & Instant
No signup required. Works in your browser.
📁 Drag & drop your file here
or click to browse • Max 100MB
✅ Free • ⚡ Instant • 🔒 Secure • 💻 No install
What Is a .mgz File?
A .mgz file is a medical format known as MGZ. FreeSurfer Compressed Volume This format is created by FreeSurfer and is widely used by radiologists and clinicians.
MGZ files contain structured medical data that requires compatible software to open. With OpenAnyFile, you can view and reconstruct .mgz files directly in your browser without installing any software.
How to Open .mgz Files Online
- Visit OpenAnyFile MGZ page
- Drag and drop your .mgz file onto the upload area, or click "Browse" to select it
- OpenAnyFile automatically detects the MGZ format using magic byte analysis
- View, analyze, and view and reconstruct your file contents in the browser
- Optionally convert to MGH, NII or download
Software That Opens .mgz Files
.mgz files are primarily created by FreeSurfer. In the medical space, you may encounter .mgz files from third-party tools, online converters, or export functions. Regardless of the source, OpenAnyFile handles them all.
Open .mgz on Different Platforms
- Windows: Use the original software or upload to OpenAnyFile for instant access
- macOS: Preview may not support .mgz — use OpenAnyFile as a universal viewer
- Linux: Open-source alternatives exist, or use OpenAnyFile in any browser
- Mobile (iPhone/Android): OpenAnyFile works on all mobile browsers
Common .mgz File Problems
Gzip compressed
Other common issues include: your OS not recognizing the file extension, the file appearing corrupted after download, or lacking the required software. OpenAnyFile bypasses all these issues with universal format detection.
Convert MGZ to Other Formats
MGZ files can be converted to 2 formats including MGH, NII.
Related Medical Formats
If you work with .mgz files, you may also encounter these medical formats:
- ANALYZE (.hdr) — Open & convert .hdr files online
- Analyze 7.5 (.hdr) — Open & convert .hdr files online
- Analyze Image (.img) — Open & convert .img files online
- ANNOT (.annot) — Open & convert .annot files online
- ARTEMIS (.art) — Open & convert .art files online
- BDF (.bdf) — Open & convert .bdf files online
- BEDPOSTX (.bedpostX) — Open & convert .bedpostX files online
- BIDS (.json) — Open & convert .json files online
- BIF (.bif) — Open & convert .bif files online
- BRAINVISA (.arg) — Open & convert .arg files online
Popular MGZ Conversions
Frequently Asked Questions
What is a .mgz file?
A .mgz file is a medical format called MGZ. FreeSurfer Compressed Volume
How do I open a .mgz file without installing software?
Upload your .mgz file to OpenAnyFile. Our browser-based tool instantly detects and displays it — no downloads needed.
What program creates .mgz files?
.mgz files are typically created by FreeSurfer.
Can I convert .mgz to another format?
Yes. OpenAnyFile converts .mgz to MGH, NII.
Is it safe to open .mgz files online?
Yes. OpenAnyFile processes files in a secure, isolated environment. Files are automatically deleted and all transfers use HTTPS.
Can I open .mgz on my phone?
Yes. OpenAnyFile works on all mobile browsers including iPhone and Android.