Open .dcm files without installing software
The standard advice for opening DICOM files is to install a viewer like OsiriX, 3D Slicer, or Horos — all excellent tools with steep learning curves and installation requirements. For clinical radiologists and researchers, that overhead makes sense. For a patient who received a CD after an MRI and just wants to see their images, it's overkill.
A browser-based DICOM parser needs nothing installed. It loads as a webpage, reads the .dcm file structure directly in JavaScript, applies the correct windowing, and renders the image. Everything a standard consumer-grade viewer does for the basics — show the image correctly, let you export it — is possible without an install.
This converter handles the core uncompressed DICOM types that hospital imaging CDs almost always use. Drop in the file and see the image. For research or clinical use cases that need MPR reconstruction, DICOM networking (DICOM C-STORE, C-FIND), or WADO-RS queries, a full workstation application is still the right tool.
Open the converter — free, no upload
Opening a DICOM file right now
- Load this page in any modern browser.
- Click the drop zone or drag a .dcm file onto it.
- The converter reads the DICOM, applies windowing, and shows a preview.
- Download as JPG, PNG or PDF.
Questions
Which browsers work?
Chrome, Safari, Firefox, and Edge — any browser released since 2020. No browser extensions or plugins needed.
Can I view DICOM on an iPad or Android tablet?
Yes. The converter works in mobile Safari and Chrome. Drag and drop is replaced by a file picker, but conversion works the same way.
What about DICOM files with no extension?
DICOM Part-10 files are identified by their internal magic bytes ('DICM' at byte offset 128), not by file extension. This converter accepts files without an extension — just drop them in.