Extend.ai has released an MIT license UI kit that bundles 14 ready‑to‑use components for PDF, DOCX, XLSX, and CSV viewers. The package adds bounding‑box citations, file upload, and e‑signature widgets, making it suitable for document‑centric workflows. A demo video showcases the kit’s polish and customization options. Developers can drop the components directly into React or Vue projects, saving weeks of integration work.

The library grew from Extend.ai’s internal stack, built after evaluating dozens of third‑party viewers that lacked polish or full feature sets. Running millions of pages per day exposed edge cases that the team fixed, from rendering quirks to performance bottlenecks. By open‑source the kit, Extend.ai invites community contributions to keep the components battle‑tested at scale. Developers can submit pull requests.

With components covering PDF, XLSX, DOCX, and CSV, the kit supports advanced features like bounding‑box annotations and e‑signing, enabling instant document intake flows for customer portals or internal dashboards. The MIT license removes barriers for commercial use, while the open‑source model encourages shared maintenance. By releasing the code, Extend.ai positions itself as a trusted resource in the document‑processing ecosystem today.