Free Online DICOM Viewer
Open a folder of DICOM files on this page and see the CT or MRI series as a 3D volume: browse the slices, set the iso level and check the voxel size.
- Free
- No sign-up
- No install
Open DICOMs → choose the folder of the series
What you can do with your DICOM file
Open a whole series
Choose the folder of a CT or MRI series: the slices open as one 3D volume with its real voxel size.
See the scan in 3D
Turn and zoom the 3D view of the scan. Volume Rendering shows the whole volume at once.
Browse the slices
Voxels Slice shows the volume slice by slice as an image (with Volume Rendering off).
Set the iso level
Change ISO sets which density the 3D surface of the scan shows.
Check the dimensions
The Information panel shows the voxel grid (for example 256 × 256 × 46), the voxel size and the size of the volume in millimeters.
Convert DICOM to STL
Build a mesh from the scan and save it as STL, OBJ or PLY in the desktop app (paid plan).
How to open a DICOM file in 3 steps
Open the DICOM folder
Click Open DICOMs in the viewer above, then Browse… and choose the folder of the series. The slices open as one 3D volume in your browser, with no account.
Look at the scan in 3D
Drag to turn the volume and scroll to zoom. Volume Rendering shows the whole scan; turn it off again to see the scan slice by slice with Voxels Slice.
Set the iso level or convert
Change ISO sets which density the 3D surface shows. To turn the scan into an STL mesh, use the desktop app (paid plan).
DICOM viewer FAQ
Is there a free DICOM viewer online?
Yes, this page. Open a DICOM series in the viewer at the top and see it as a 3D volume and slice by slice, free and without sign-up. The files are read in your browser and are not uploaded. MeshInspector is a 3D tool, not a diagnostic one: use it to view and prepare scans, not to diagnose.
How do I view a DICOM file?
Click Open DICOMs in the viewer at the top, then Browse… and choose the folder of the series: a CT or MRI scan is usually many .dcm files, one per slice. MeshInspector assembles them into one volume. Volume Rendering shows the whole scan; with it off, Voxels Slice shows it slice by slice.
What is a DICOM viewer?
A DICOM viewer opens medical images stored in the DICOM format, such as CT and MRI scans, and shows them as slices or as a 3D volume. MeshInspector shows a series in 3D with its real voxel size, and its desktop app turns the scan into a 3D mesh that you can save as STL.
Can I convert DICOM to STL?
Yes, in the desktop MeshInspector app: Voxels to Mesh builds a 3D mesh from the volume, and Export saves it as STL, OBJ or PLY. That tool needs the paid Professional plan. The viewer on this page shows the scan in 3D and slice by slice; it does not export meshes.
Are my scans uploaded anywhere?
No. In the viewer on this page the DICOM files are read in the memory of your browser and are not sent to a server, and no account is needed. The desktop app also works with the files on your computer. Remove patient names and other personal data before you share a scan with anyone.
Add a DICOM Viewer to Your App
- Multi-Format Support — meshes, point clouds, voxels, and line data
Modern UI — built with Dear ImGui: ribbon interface, scene tree, view cube, and measurement tools.
Order-Independent Transparency (OIT) — realistic rendering of transparent materials.
Customizable Interaction — support for mouse, keyboard, touch gestures, and SpaceMouse devices.
Plugin Architecture — extend the Viewer with your own tools and workflows.
