Mia Perese
Published April 15, 2026
Updated April 15, 2026
3 min
Multiviewer: True Editing Workspace with Side-by-Side Interaction Capabilities
Mia Perese
WebViewer now offers enhanced editing support for side-by-side document comparison, helping users compare and edit documents more intuitively.
Multiviewer was originally optimized for reference and comparison use cases. It enabled users to view multiple documents at once, making it easy to review similarities and differences across files. With this release, Multiviewer now supports all the same editing capabilities available in WebViewer, across every supported file type.
Before this release, users could:
- Open multiple documents side by side or in a multi-tab view
- Compare PDFs, Office files, images, and other WebViewer file types
- Scroll, zoom, and review content synchronized or independently
These capabilities were ideal for viewing multiple documents, but users had more advanced use cases when comparing files. Common multi-document comparison scenarios include:
- Contract redlining: make corrections to one version of a document while keeping the original visible for side-by-side review
- Patient intake: modifying a PDF while referencing an uploaded image or supporting file
- Engineering review: displaying two versions of a technical document to verify measurements, apply markups, or validate changes
From Static Comparison to Active Work
With this release, Multiviewer becomes a fully interactive workspace. Users can now:
- Edit multiple documents directly while keeping them in a single view
- Make content changes across PDFs, images, Office files, and more
- Interact with each document independently or simultaneously, just like in WebViewer
Figure 1: Comparing two documents in Multiviewer.
Editing no longer disrupts comparison workflows, allowing users to review, validate, and act in one place. This update aligns with enhancements across the Web SDK’s other editors. DOCX Editor now supports comments for review workflows that don’t require direct content changes, while Spreadsheet Editor offers in-app chart interaction for adjusting data and visuals.
These improvements streamline tasks where users shift between documents, spreadsheets, and comparison views. Explore the full set of updates in the release notes or start testing WebViewer’s Multiviewer editing capabilities in the Showcase.
