OpenAnyFile Formats Conversions File Types

GIFTI File — Open & Convert .gii Online

What Is a .gii File?

GIFTI (.gii) is a medical file format. GIFTI Surface Data Created by NIfTI, this format is essential for radiologists and clinicians.

How to Open .gii Files

Upload your .gii file to OpenAnyFile and instantly view and reconstruct it in your browser. No software installation required. Works on Windows, macOS, Linux, iPhone, and Android.

Everything About GIFTI Files

Popular GIFTI Conversions

Frequently Asked Questions

What is a .gii file?

A .gii file is a medical format called GIFTI. GIFTI Surface Data

How do I open a .gii file without installing software?

Upload your .gii file to OpenAnyFile. Our browser-based tool instantly detects and displays it — no downloads needed.

What program creates .gii files?

.gii files are typically created by NIfTI.

Can I convert .gii to another format?

Yes. OpenAnyFile converts .gii to VTK, STL.

Is it safe to open .gii files online?

Yes. OpenAnyFile processes files in a secure, isolated environment. Files are automatically deleted and all transfers use HTTPS.

Can I open .gii on my phone?

Yes. OpenAnyFile works on all mobile browsers including iPhone and Android.

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