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Free Online DICOM Viewer

Open DICOM (.dcm) files in your browser, view CT and MRI scans in 2D and 3D, and upload selected series for AI analysis

Free online DICOM (.dcm) viewer with 3D view

Open CT and MRI scans instantly in your web browser, scroll through slices, rotate the whole scan in 3D, save the current image as JPEG, and upload the right series for AI analysis from the same page when you are ready.

  1. 1
    Select the folder containing your DICOM (.dcm) files
  2. 2
    Preview CT or MRI slices instantly in the browser, or switch to View 3D to rotate the full volume
  3. 3
    Use Save Image to download the currently displayed slice as a JPEG
  4. 4
    Upload the selected series for AI analysis from the same page
  5. 5
    Get a plain-language report in minutes
Private local preview
Encrypted upload
Delete anytime

Open Your Scan Folder

View .dcm files online in your browser, in 2D or 3D, then upload selected series for analysis

How to upload DICOM files View sample MRI report

What is a free online DICOM viewer?

A free online DICOM viewer lets you open medical imaging files with the .dcm extension directly in your web browser. You can scroll through scan slices, rotate a 3D reconstruction of the whole series, confirm you have the right series, and review CT or MRI images without installing desktop software. Read the DICOM upload guide -> Need to send the files to someone else? Strip the patient name and other identifiers first with our free DICOM anonymizer online ->

From viewer to AI analysis

This page keeps the viewer-first workflow: preview your scans locally in the browser, then upload the selected CT or MRI series only when you want an AI report. Learn more ->

View 3D

View your CT or MRI scan in 3D, right in the browser

Every DICOM series is a stack of cross-sectional slices. The View 3D button turns that stack into an interactive volume rendering on your own device: turn the whole scan around, peel back the skin to see muscle and bone, and cut through the body slice by slice. No upload, no plugin, no desktop software.

  • Works with CT and MRI series of 20 or more slices
  • Tissue presets: bones, muscles and tissue, body surface, lungs and airways (CT); standard and bright-structure views for MRI
  • Drag to rotate, scroll or pinch to cut through the volume
  • Rendered entirely in your browser with WebGL2 on desktops, laptops and tablets

The 3D view is illustrative and not intended for clinical diagnosis. It is a quick way to understand your scan, not a replacement for a radiologist's report.

What you can do with this free online DICOM viewer

A viewer-first page for opening DICOM files in the browser, viewing them in 2D and 3D, exporting slices as JPEG, and moving straight into AI analysis when you are ready.

Free online DICOM (.dcm) viewer

Open DICOM files online in your browser for free. Works on Windows, Mac and Linux, in Safari too, with no desktop download, no installer, and no extra viewer app.

CT and MRI scan preview

Scroll through CT and MRI slices instantly to confirm the right series before you upload anything for analysis.

Upload for AI analysis from the same page

Preview first, then upload the selected series for AI analysis without navigating to a separate upload page.

Save Image as JPEG

Use the Save Image button in the viewer to download the currently displayed slice as a JPEG file, a one-click DICOM to JPEG conversion for sharing a snapshot.

Interactive 3D volume view

Click View 3D to rebuild a CT or MRI series as a rotatable 3D volume, right in your browser. Switch between bone, soft-tissue, skin and lung presets and cut through the body with your mouse wheel.

Private local-first workflow

Your scans stay on your device while you preview them in the browser. Files are only uploaded if you choose to start analysis.

Looking for a CT-specific AI analysis page instead?

Frequently Asked Questions

Common questions about our free online DICOM viewer, the 3D view, DICOM to JPEG conversion, and browser-based scan preview.

Is the DICOM viewer really free?
Yes, 100% free with no limits. You can view as many DICOM files as you want, as often as you want. No account required, no credit card, no hidden fees.

Do my DICOM files get uploaded to a server?
No. Your files are processed entirely in your browser using JavaScript. Nothing is uploaded to any server. Your medical images never leave your device, ensuring complete privacy.

What file formats does the viewer support?
The viewer supports standard DICOM files (.dcm) from CT scans, MRI scans, and other medical imaging modalities. You can upload individual .dcm files or entire DICOM folders containing hundreds of slices.

Can I view both CT and MRI scans in this viewer?
Yes. The viewer supports all standard DICOM files regardless of modality — CT scans, MRI scans (all sequences including T1, T2, FLAIR). It automatically detects the modality from the DICOM metadata.

Does the viewer work on Mac, Linux, and Windows?
Yes. The viewer runs entirely in your web browser, so it works on any operating system — Mac, Windows, Linux, and even tablets. No software installation required. Works best in Chrome, Firefox, Edge, and Safari.

Can I view DICOM files in 3D online?
Yes. After you open a CT or MRI series with 20 or more slices, a View 3D button appears above the preview. It builds an interactive 3D volume of the scan directly in your browser using your device's graphics card (WebGL2), so nothing is uploaded. You can rotate the model, switch between bone, soft-tissue, skin and lung presets, and cut through the body with the scroll wheel. The 3D view is available on desktops, laptops and tablets; phones keep the 2D slice viewer.