NIfTI viewer online (.nii / .nii.gz)
Open NIfTI volumes (.nii or .nii.gz) directly in your browser with full 2D multiplanar and 3D volume rendering. Files load locally — no upload and no software to install.
Opens: NIfTI files: .nii or gzip-compressed .nii.gz. · Files are processed in your browser — nothing is uploaded.
How to use it
- 1.Click “Upload NIfTI file” and choose your .nii or .nii.gz volume.
- 2.It renders immediately in axial, coronal, sagittal and 3D views.
- 3.Adjust the intensity window, colormap and interpolation as needed.
FAQ
- Does it support .nii.gz?
- Yes — both uncompressed .nii and gzip-compressed .nii.gz load directly.
- Is my NIfTI file uploaded anywhere?
- No. The volume is parsed and rendered in your browser; nothing is sent to a server.
- Can I view multiple volumes?
- Yes, you can load several NIfTI files and switch between them in the series list.
Want your scan explained in plain language?
The viewer is free. Create an account to upload a scan (de-identified in your browser) and get an AI-generated, plain-language report and grounded Q&A. Informational only — not a medical diagnosis.