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. Axial, coronal and sagittal views are MPR reformats rebuilt from the volume, and a slab MIP or MinIP is one click away.
Drop your scan or report here
DICOM, images (JPG/PNG) or a report PDF — add it all together
- Encrypted in transit & at rest
- You control deletion
- We never sell your data
- Results in minutes, not days
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.
- Does it support MPR and MIP?
- Yes. The viewer reads the whole volume rather than a stack of pictures, so the axial, coronal and sagittal views are genuine MPR reformats. Under Advanced options you can switch on a slab projection and set its thickness in millimetres: MIP keeps the brightest voxel through the slab (vessels, bone), MinIP the darkest (air, airways). Projections work on one plane at a time; oblique and curved (CPR) reformats are not supported yet.
Want your scan explained in plain language?
The viewer is free — and so is understanding your radiologist’s report. Create an account, upload your scan (de-identified in your browser) and your report, and every finding is mapped onto the images, explained in plain language and scored — no card needed. An independent AI reading of the images is a paid extra. Informational only — not a medical diagnosis.