An open-source DICOM viewer for standalone and web use, built for medical image visualization in PACS and DICOM workflows — from routine reading to AI-assisted review and quantitative imaging. It is used by hospitals, health networks, multicenter research trials, and patients.

General features:

Open source under the EPL 2.0 or Apache 2.0 license
Integrates with PACS, VNA, RIS, HIS, or EHR
Desktop builds for Windows, macOS, and Linux; web launch via the weasis:// protocol
Responsive UI for high-DPI screens, with support for over 20 languages
Server- and client-side configuration with multi-level overrides
API for custom plug-ins; embeddable viewer for CD/DVD or portable media
The Dicomizer module converts images, videos, PDFs, and STL meshes into DICOM

Connectivity and interoperability:

Classic DIMSE: Query/Retrieve (C-FIND, C-GET, C-MOVE) and Store (C-STORE)
DICOMweb (QIDO-RS, WADO-RS, STOW-RS) and WADO-URI for legacy PACS
Authentication via Basic, OAuth 2.0, and OpenID Connect, working with Keycloak, Google Cloud Healthcare, or any OIDC provider
Send to PACS or DICOMweb, or export locally as DICOMDIR ZIP, ISO with embedded viewer, or common image and video formats

Viewer features:

Broad data-type support, including multi-frame, Enhanced CT/MR/US volumes, SR, PR, KOS, SEG, RT, ECG, and Parametric Map, with the common DICOM codecs
Multi-monitor viewing with per-monitor calibration, HiDPI, and full-screen; customizable mouse and keyboard controls
Advanced imaging: oblique MPR, MIP, 3D volume rendering with segmentation overlay, 4D/multi-phase splitting, and side-by-side comparison layouts
Measurement and annotation, including length, area, angle (Cobb), pixel-region statistics, histograms, and SUV for PET/nuclear imaging
Dedicated viewers for ECG waveforms, structured reports (SR), audio (AU), and radiotherapy (RT structure set, dose, DVH)

Weasis

Install on Linux