DWV (DICOM Web Viewer) review
A free, browser-based DICOM viewer for image review—not a PACS archive.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
DWV (DICOM Web Viewer) is an open-source JavaScript and HTML5 viewer library for displaying medical images in a web browser. It suits developers who need to add DICOM viewing to an application, as well as teams seeking a free way to inspect local files or retrieve remote DICOM data. Its documented modality coverage includes MR, CT, Echo, Mammo and NM. DWV is focused on viewing rather than managing an imaging archive, so it is not a fit for teams looking for PACS storage in the product itself.
The viewing toolkit covers practical image interaction: users can adjust contrast and window/level, zoom and pan, reorient images, draw regions and annotations, apply threshold or sharpening filters, and use overlays. For remote data, DWV supports DICOMweb retrieval via WADO-RS and WADO-URI; the project includes an Orthanc DICOMweb example. This combination makes it relevant where a browser interface needs to connect with an existing DICOM source. It remains a viewer library, however, rather than a complete imaging environment with archive capabilities.
DWV is free and open source, with documentation and community support. Its browser-based access is not the same as a hosted cloud PACS: the library is integrated into a web application, and the listed cloud deployment describes browser access. The project documentation also says DWV is not certified for diagnostic use. Developers building a viewer or teams needing non-diagnostic image access may find its scope appropriate; organizations needing PACS storage or a viewer certified for diagnostic use should choose a different product.
DWV (DICOM Web Viewer) pros and cons
- Where it wins
- Loads local DICOM files and remote data URLs
- Offers window/level, zoom, pan, annotations, filters and overlays
- Retrieves DICOMweb data through WADO-RS and WADO-URI
- Where it doesn't
- Does not provide PACS storage
- Is a viewer library to integrate into a web application, not a hosted PACS
- Project documentation says it is not certified for diagnostic use
DWV (DICOM Web Viewer) fact sheet, pricing and score →
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