Open DCM files online
DICOM is the medical-imaging standard for CT, MRI and X-ray scans, with image data plus patient metadata.
Drop a DCM file to open it
or click to choose — everything stays on your device
Choose file🔒 100% private — files never leave your browser
What is a DCM file?
DICOM is the medical-imaging standard for CT, MRI and X-ray scans, with image data plus patient metadata. The .DCM extension identifies a Digital Imaging and Communications in Medicine file, which is served with the application/dicom media type. You can open it here instantly — drop the file into the box above and it renders in your browser. Nothing is uploaded.
Besides this free online viewer, you can open DICOM (medical) files in desktop apps such as OsiriX, RadiAnt, Horos — but here all you need is a web browser.
Quick facts
| Format | DICOM (medical) — Digital Imaging and Communications in Medicine |
|---|---|
| File extensions | .dcm .dicom |
| MIME type | application/dicom |
| Developer | NEMA |
| Category | Specialised |
| Also opens in | OsiriX, RadiAnt, Horos |
How to open a DCM file online
- Click Choose file above, or drag your DCM file onto the box.
- The right viewer loads automatically and renders your file.
- Read, scroll or page through it. To open a different file, choose Open another file.
100% private — files never leave your browser.
Libraries used to render DCM in the browser
This viewer is built entirely with open-source JavaScript that runs in your browser:
Frequently asked questions
What is a .DCM file?
A .DCM file is a Digital Imaging and Communications in Medicine, identified by the application/dicom media type. You can open and read it instantly in the viewer above without installing anything.
What programs open DCM files?
On the desktop, DCM files typically open in OsiriX, RadiAnt, Horos. Online, this page opens them in any modern browser — nothing to download.
Is it safe to open my DCM file here?
Yes. The file is read and rendered entirely by JavaScript inside your own browser. It is never uploaded to a server, so nothing leaves your device.
Do I need to install anything to view a DCM file?
No. There is nothing to install and no account to create. Open the page, drop your file, and it displays instantly.
Does it work on my phone or iPad?
Yes. The viewer is fully responsive and works in modern mobile and tablet browsers such as Safari and Chrome.
Is there a file size limit?
There is no hard limit, but very large files depend on your device’s memory. Big files are processed in the background so the page stays responsive.