We built an open source UI kit for document RAG/agents

Check it out here: https://www.extend.ai/ui 15 components & examples for PDF, DOCX, and XLSX viewers, plus bounding box citations, file upload, e-signature, file systems, and more MIT licensed fully customizable I'm the founder of a startup called Extend, and when we first started, we tried every file viewer and document component library we could find. Unfortunately, none of them had all the functionality (and polish) that we wanted, so we ended up building our own. It was only ever meant to be internal, but enough customers kept asking for it that we decided to open source it. It's useful for building document processing agents, real-time user facing document intake flows, or all kinds of internal tooling. We naively thought this would be a solved problem. Turns out, making PDF/XLSX/DOCX viewers that work at scale is not trivial...we use and maintain it for Extend ourselves, so we've fixed a lot of edge cases that came up while running millions of pages / day through our own system. Our hope is that with our resources + community support, it'll keep getting better over time.