DICOM Viewer

Free Online DICOM Viewer - View Medical Images Instantly

Looking for a free DICOM viewer online to view medical images without downloading software? Our web-based DICOM viewer lets you instantly view CT scans, MRI images, X-rays, and other medical imaging files directly in your browser. No installation, no registration - just fast, secure DICOM image viewing.

Why Choose Our Online DICOM Viewer?

Unlike traditional DICOM viewer downloads like Radiant DICOM Viewer, OsiriX, or MicroDICOM Viewer that require installation, our DICOM web viewer works entirely in your browser. Perfect for healthcare professionals, radiologists, students, and patients who need quick access to medical images without complex software setup.

Key Features of Our DICOM Image Viewer

View All DICOM Medical Image Formats

• CT Scan Viewer: View computed tomography images with full window/level control
• MRI Viewer: Display magnetic resonance imaging with T1, T2, and FLAIR presets
• X-Ray Image Viewer: Open digital radiography and mammography files
• Ultrasound Viewer: View sonography and Doppler imaging
• Supports DICOMDIR and multi-frame DICOM files

Professional Window/Level Controls

Our DICOM viewing software includes advanced window/level (brightness/contrast) controls with medical-specific presets:

• CT Presets: Brain, Bone, Lung, Abdomen, Liver, Subdural windows
• MRI Presets: T1, T2, FLAIR, optimized for different tissue contrasts
• Custom Adjustments: Manual sliders for precise image optimization
• Auto Window/Level: Automatically calculates optimal display settings

Complete DICOM Metadata Viewer

View comprehensive DICOM tag information including:

• Patient demographics (name, ID, age, sex)
• Study details (date, time, description, modality)
• Image parameters (rows, columns, pixel spacing, slice thickness)
• Equipment information (manufacturer, model, software version)
• Searchable Tag List: Quickly find specific DICOM tags with built-in search

Export and Share Medical Images

• Export to PNG: Save current view as high-quality image
• Export Metadata: Download DICOM tags as JSON or CSV
• Perfect for presentations, reports, or sharing with colleagues

100% Private and Secure Processing

Unlike PACS viewers that require server connections, our DICOM viewer processes everything locally:

• No uploads: Your medical images never leave your device
• HIPAA-conscious: Complete privacy for patient data
• Client-side only: All processing happens in your browser
• No account needed: Start viewing immediately without registration

How to Use Our Free DICOM Viewer Online

1. Upload DICOM File: Click "Browse Files" or drag and drop your .dcm or .dicom file
2. View Your Image: Image displays automatically with optimal window/level settings
3. Adjust Display: Use presets or manual controls to optimize image quality
4. Explore Metadata: Switch to Metadata tab to view all DICOM tags
5. Export if Needed: Save images or metadata for your records

DICOM Viewer for Every Platform

DICOM Viewer Mac Online

Mac users no longer need to download Horos DICOM viewer or purchase OsiriX software. Our web-based DICOM viewer for Mac works perfectly in Safari, Chrome, or Firefox - no installation required.

DICOM Viewer Windows

Windows users can skip installing RadiAnt DICOM Viewer, MicroDICOM Viewer, or other DICOM viewer Windows 10 software. Our online viewer works directly in any modern browser.

DICOM Viewer Linux

Linux users get full-featured DICOM viewing without compiling software or managing dependencies. Perfect alternative to desktop DICOM viewer Linux applications.

DICOM Viewer Android & Mobile

View DICOM files on your smartphone or tablet. Our mobile DICOM viewer is fully responsive and works on any device with a web browser.

Compare: Online vs Desktop DICOM Viewers

Common Use Cases for DICOM Viewing

For Healthcare Professionals and Radiologists

• Quick review of medical images without loading PACS server
• Second opinion consultations via secure image sharing
• Teaching and education with medical image viewer demonstrations
• Remote work and telemedicine applications

For Patients and Families

• View your own medical images from CD or USB from doctor
• Understand MRI or CT scan results before consultation
• Share images with other physicians for second opinions
• Keep personal medical image archives accessible

For Medical Students and Researchers

• Study medical imaging cases and anatomy
• Educational DICOM image viewing without expensive software
• Research and analysis of de-identified medical images
• Practice interpreting CT scans, MRIs, and X-rays

For Medical IT and System Administrators

• Quick DICOM image viewer for troubleshooting
• Test DICOM files before uploading to PACS systems
• Verify image quality and metadata integrity
• Emergency access when PACS viewer is unavailable

Frequently Asked Questions About DICOM Viewers

What is DICOM?

DICOM (Digital Imaging and Communications in Medicine) is the international standard for medical images and related information. It defines the format for medical imaging data and how devices communicate in healthcare.

What is the best free DICOM viewer?

Our online DICOM viewer is the best choice for instant, hassle-free viewing without downloads. For desktop applications, popular options include RadiAnt DICOM Viewer (paid), Horos (Mac only, free), and MicroDICOM (Windows, free basic version).

Can I view DICOM images on Mac without software?

Yes! Our DICOM viewer Mac online works directly in your browser - no need to download OsiriX software or Horos. Simply upload your DICOM file and view instantly.

How do I open a DICOM file?

Simply upload your DICOM file to our viewer - we accept files with any extension (including .dcm, .dicom, or files without extensions commonly found on medical CDs). Our viewer validates the file content, not the filename. For desktop alternatives, consider RadiAnt, Horos, MicroDICOM, or Centricity DICOM Viewer.

Is this a PACS viewer?

While we're not a full PACS (Picture Archiving and Communication System), our viewer can display DICOM images from PACS systems. For complete PACS functionality with DICOM server integration, consider OnePACS or similar enterprise solutions.

Can I view DICOMDIR files?

Yes, our viewer supports DICOMDIR files commonly found on medical imaging CDs. Simply upload the DICOMDIR file to browse and view contained studies.

What modalities does your DICOM viewer support?

We support all standard medical imaging modalities: CT (Computed Tomography), MR (Magnetic Resonance), CR (Computed Radiography), DX (Digital Radiography), US (Ultrasound), MG (Mammography), and more.

Is this DICOM viewer safe and HIPAA-compliant?

Yes. All processing happens locally in your browser - your medical images never leave your computer. This client-side architecture makes our viewer inherently more private than cloud-based PACS viewers that upload files to servers.

Can I use this for clinical diagnosis?

This tool is designed for viewing and educational purposes. For clinical diagnosis, use certified medical-grade DICOM viewing software and consult with qualified healthcare professionals.

What's the difference between this and RadiAnt DICOM Viewer?

RadiAnt DICOM Viewer is professional desktop software ($300+) with advanced 3D reconstruction and multi-planar reformation. Our online DICOM viewer is free, requires no installation, and perfect for basic viewing, metadata inspection, and quick consultations.

Can I view 3D DICOM images?

Currently, we support 2D DICOM viewing. For DICOM 3D viewer capabilities with volume rendering and MPR, consider desktop applications like OsiriX, Horos, or 3D Slicer.

How do I get DICOM images from my doctor?

Ask your healthcare provider for your images on CD/DVD or USB drive. Most hospitals provide DICOM files in this format. You can then upload them to our online DICOM viewer or use desktop DICOM viewing software.

Alternative DICOM Viewers: Quick Comparison

Desktop DICOM Viewers

RadiAnt DICOM Viewer (Windows)

• Professional-grade desktop viewer
• Fast performance and 3D capabilities
• $299 one-time purchase
• Best for: Windows users needing advanced features

Horos DICOM / OsiriX (Mac)

• Popular free option for Mac users
• 64-bit with modern macOS support
• Open-source and well-maintained
• Best for: Mac users wanting free desktop software

MicroDICOM Viewer (Windows)

• Free basic version available
• Simple interface for quick viewing
• Limited features compared to paid versions
• Best for: Windows users needing basic free viewer

EZ DICOM Viewer / SonicDICOM

• Simple web and desktop options
• Basic viewing capabilities
• Various free and paid versions
• Best for: Quick occasional viewing

Online DICOM Viewers

Our DICOM Web Viewer

• 100% free, no registration
• Advanced window/level controls
• Complete privacy (client-side processing)
• Best for: Everyone wanting instant browser-based viewing

Philips DICOM Viewer / GE Centricity

• Enterprise solutions for healthcare systems
• Integrated with PACS infrastructure
• Require licensing and setup
• Best for: Hospitals and large medical facilities

IMAIOS DICOM Viewer

• Web-based with upload to server
• Good for basic online viewing
• Files uploaded to their servers
• Best for: Non-sensitive images only

Advanced DICOM Viewing Tips

Optimizing Window/Level for Different Studies

• Brain CT: Use "Brain" preset (Window: 80, Level: 40) to see gray/white matter contrast
• Bone CT: Use "Bone" preset (Window: 2000, Level: 300) for fractures and skeletal detail
• Lung CT: Use "Lung" preset (Window: 1500, Level: -600) for pulmonary pathology
• MRI T1: Use "T1" preset for anatomical detail and fat-bright sequences
• MRI T2: Use "T2" preset for fluid-bright and pathology visualization

Understanding DICOM Metadata

DICOM files contain extensive metadata beyond the image:

• Patient Info: Demographics, medical record numbers
• Study Details: When and why the scan was performed
• Series Information: Scan protocol and sequence parameters
• Image Parameters: Technical settings affecting image quality
• Equipment Data: Scanner manufacturer and model information

Exporting for Different Purposes

• For Presentations: Export to PNG with optimal window/level for your audience
• For Medical Records: Export metadata to CSV for documentation
• For Research: Export DICOM tags to JSON for data analysis
• For Consultations: Screenshot key findings at appropriate window/level

Privacy and Security: Why Local Processing Matters

Traditional PACS viewers and some online DICOM viewers upload your medical images to remote servers. This creates potential privacy risks with sensitive patient data. Our DICOM web viewer uses cutting-edge browser technology to process everything locally:

• WebAssembly: High-performance medical image processing in your browser
• No Server Upload: Your DICOM files never leave your device
• Instant Processing: No upload/download delays
• HIPAA-Conscious Design: Privacy-first architecture
• Secure by Default: No data to breach if nothing is stored

Getting Started: View Your Medical Images Now

Ready to view DICOM images online? Whether you have CT scans, MRI images, X-rays, or other medical imaging files, our free DICOM viewer makes it easy to open, view, and analyze your medical images - no software installation required.

Perfect for: Healthcare professionals, radiologists, medical students, researchers, patients, and anyone needing quick access to DICOM medical images.

No downloads. No registration. No cost. Just fast, secure medical image viewing in your browser.

Upload your DICOM file now and experience the easiest way to view medical images online.