Weasis is a DICOM viewer available as a desktop application or as a web-based application.
Clone or download
Latest commit b95fc90 Nov 7, 2018


License Build Status
Sonar Sonar Sonar Sonar Sonar

Weasis is a free medical DICOM viewer used in healthcare by hospitals, health networks, multicenter research trials, and patients.


Build Weasis

The master branch contains Weasis 3.x.x (requires Java 8+) and the old branches are 2.5.x, 2.0.x (Java 6+) and 1.2.x (Java 6+).

See How to build Weasis

Release History

General Features

  • Flexible integration to HIS or PHR (see weasis-pacs-connector)
  • Web-based distribution (Java Webstart)
  • Desktop portable distribution (Windows, Mac OS X, and Linux)
  • Embedded DICOM viewer (portable distribution) in CD/DVD or other portable media
  • Can be configured with very low memory footprint. Do not require modern hardware.
  • Multi-language support
  • Configuration of preferences on server-side and client-side
  • API for building custom plug-ins
  • DICOM Send (storeSCU and STOW RS)
  • DICOM Query/Retrieve (C-GET, C-MOVE and WADO)
  • Dicomizer module (allow importing standard images and convert them in DICOM)

Viewer Features


  • Display all kinds of DICOM files (including multi-frame, enhanced, MPEG-2, MPEG-4, MIME Encapsulation, SR, PR, KOS, AU, RT and ECG)
  • Viewer for common image formats (TIFF, BMP, GIF, JPEG, PNG, RAS, HDR, and PNM)
  • Image manipulation (pan, zoom, windowing, presets, rotation, flip, scroll, crosshair, filtering...)
  • Layouts for comparing series or studies
  • Advanced series synchronization options
  • Display Presentation States (GSPS) and Key Object Selection
  • Create key images (Key Object Selection object) by selection
  • Support of Modality LUTs, VOI LUTs, and Presentation LUTs (even non-linear)
  • Support of several screens and full-screen mode
  • Multiplanar reconstructions and Maximum Intensity Projection
  • Display Structured Reports
  • Display cross-lines
  • Measurement and annotation tools
  • Region statistics of pixels (Min, Max, Mean, StDev)
  • SUV measurement
  • Save measurements and annotations in DICOM PR or XML file
  • Import CD/DVD and local DICOM files
  • Export DICOM with several options (DICOMDIR, ZIP, ISO image file with Weasis, TIFF, JPEG, PNG...)
  • Magnifier glass
  • Native and DICOM printing
  • Read DICOM image containing float or double data (Parametric Map)
  • DICOM ECG Viewer