Weasis

At a glance

• Editor score
  8.1 / 10
• Pricing
  Free plan
• Best for
  Teams wanting a free, feature-rich DICOM desktop viewer
• Free plan
  Yes
• Paid from
  Free
• Deployment
  On-premise
• Facts checked
  24 Sep 2026

• Where it wins

  • Broad DICOM and DICOMweb query, retrieval and sending support
  • MPR, MIP, 3D rendering, measurements and annotations
  • Handles segmentation, radiotherapy objects, ECG and structured reports

• Where it doesn't

  • Does not provide PACS storage
  • No built-in AI image-analysis tools
  • Desktop deployment with docs and community support

Our verdict on Weasis

For imaging teams that need a desktop viewer without licensing fees, Weasis combines open-source distribution with support for Windows, macOS and Linux. It opens local DICOM studies and common non-DICOM formats, while connecting to PACS and DICOMweb archives. The viewer covers CT, MR, US, PET, SPECT, ECG and radiotherapy objects, making it suitable for small, mid-market and enterprise workflows that need review and exchange rather than centralized image management.

Its connectivity is a major strength. Weasis supports DICOM Query/Retrieve through C-FIND, C-GET, C-MOVE and WADO-URI, alongside DICOMweb QIDO-RS, WADO-RS and STOW-RS. Studies can be sent to PACS or DICOMweb servers, and the application can fit EHR, RIS and HIS workflows, including launches from web portals. For interpretation, it offers 2D manipulation and DICOM rendering, MPR, MIP and 3D volume rendering, plus measurements, annotations and pixel-region statistics. It can also display DICOM segmentation, radiotherapy objects, ECG waveforms and structured reports.

As a free, open-source desktop application, Weasis keeps entry costs low and can convert standard images, videos, PDFs and STL meshes into DICOM. Its scope is viewing, conversion and exchange: it does not provide PACS storage, so organizations need an external PACS or DICOMweb server for centralized archiving. The open-source distribution is not a certified medical device, and support is centered on documentation and community channels. Teams seeking a broad viewer for existing imaging infrastructure should consider Weasis; teams requiring built-in AI analysis, managed storage or a certified medical device should choose a product designed for those needs.

Your product? Our editors can test Weasis in depth and publish a review, labelled as paid · from $149/mo →

Weasis pricing

Weasis fact sheet

Weasis integrations

Weasis lists 5 integrations on its own site.

• PACS
• DICOMweb archives
• EHR
• RIS
• HIS

Alternatives to Weasis

• Siemens syngo CarbonA broad enterprise imaging suite for organizations consolidating viewing, archiving, workflow and reporting.9.3
• Intelerad IntelePACSEnterprise PACS combining diagnostic viewing, DICOM services, portals, and remote reading.9.2
• GE HealthCare Centricity Universal ViewerBroad image viewing and specialty workflows for teams across clinical settings.9.1

See all Weasis alternatives →

Featured on iTechGuides

Weasis is listed in our Medical Imaging Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update