Compare
Free DICOM viewers compared.
This table compares nine free DICOM viewers on platform, install, free-use terms, oblique MPR, MIP, exam mode and case sharing. The facts come from each product's own website, checked October 2026.
Free DICOM viewers at a glance
| Viewer | Runs on | Install needed | Free use terms | Oblique MPR | MIP | Exam/class mode | Case-share link |
|---|---|---|---|---|---|---|---|
| NoustaView | Runs in the browser (Chromium recommended) | No install | Free (viewer, MPR, measurements, Exam Mode, image export) | Yes | Yes | Yes | Yes (Supporter and Pro) |
| RadiAnt DICOM Viewer | Windows | Yes (installer) | — | Yes | — | — | — |
| Horos | macOS | Yes (desktop install) | Free and open source (LGPL 3.0) | — | — | — | — |
| OsiriX Lite | Mac | — | Free demo version of OsiriX; OsiriX MD is commercial | — | — | — | — |
| MicroDicom | Windows | Installer or portable | Free for non-commercial use | Yes | Yes (MIP, MinIP, AVG) | — | — |
| Weasis | Standalone and web-based | — | Free (EPL 2.0 / Apache 2.0) | Yes (oblique reconstruction) | Yes (MIP slabs) | — | — |
| 3D Slicer | Desktop app, also runs in a web browser | — | BSD-style licence | — | — | — | — |
| IMAIOS DICOM Viewer | Browser | No installation | Free for personal and non-commercial use | — | — | — | — |
| OHIF Viewer | Web-based | — | Open source (MIT licence) | — | — | — | — |
— means the product's website doesn't state it.
Checked October 2026 against each product's official website. Product names belong to their owners; NoustaView isn't affiliated with any of them.
Sources
How to read this table
Some of these viewers are desktop programs you install on one operating system. Others open in a browser tab, so there is nothing to install and the same page works on any computer with a suitable browser. Which suits you depends on where you work and what you are allowed to install.
Free does not mean the same thing for every product. Check each product's own licence before clinical or commercial use. A dash is a gap in what the website states, not a statement that the feature is absent.
Comparison articles
- RadiAnt alternative for Mac: RadiAnt's website offers Windows downloads only; a browser-based option for Mac.
- Horos alternative for Windows: Horos's website lists macOS builds; a browser-based option for Windows.
- Best free DICOM viewer for medical students: what students usually need, and nine free options compared.
Related
It is not a certified medical device and is not intended for primary diagnostic use, and it does not replace a calibrated diagnostic workstation.