Show HN: Extend UI – open-source UI kit for modern document apps
open sourcesoftware developmentweb developmentdocument viewerPDFDOCXXLSXMIT license
Author: kbyatnal
Date: 6/10/2026
Article Summary:
The author is open-sourcing 14 components and examples for PDF, DOCX, and XLSX viewers, including features like bounding box citations, file upload, and e-signature, under the MIT license.