/AI10h ago

Extend Releases Open-Source UI Components For Document Agents

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Original postjason#931
Kushal Byatnal@kushalbyatnal

Introducing Extend UI — open-source components for document agents

- 14 components & examples for PDF, DOCX, and XLSX viewers, plus bounding box citations, file upload, e-signature, and more - fully customizable - MIT licensed

when we 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 for @ExtendHQ

it was only ever meant to be internal, but enough customers kept asking for it that we decided to give it back to the community

it's useful for building agents, user-facing document flows, or internal tools

we use and maintain it for Extend ourselves, so it'll keep getting better over time (and it's battle tested on millions of pages running through our system every day)

it also works with design system agents like @magicpatterns for faster exploration and prototyping

available today on the @shadcn component registry! some examples in 🧵

8:31 AM · Jun 9, 2026 · 70K Views
Sentiment

Users are excited about Extend UI open-sourcing document components for AI agents because the simple well-made library will save time on repetitive design work they have done many times before.

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Kushal Byatnal@kushalbyatnal

E-Signature component for placing, reviewing, and completing signature fields on PDF documents

10hViews 1.2KLikes 6Bookmarks 1
BOOKMARKS13LIKES19
Kushal Byatnal@kushalbyatnal

available here today: https://ui.extend.ai/

10hViews 605Likes 19Bookmarks 13
RETWEETS1
Kushal Byatnal@kushalbyatnal

@Teddarific @andrewlu0 the magic patterns animations also go hard 👀

9hViews 213Likes 3
REPLIES1
Noureddin@noor_tekk

@kushalbyatnal this is exactly what we need, plugging it into @hipocampus_ai rn

8hViews 69Likes 2
Kushal Byatnal@kushalbyatnal

React PDF viewer component with bounding box citation support, page controls, zoom, search, text selection, thumbnails, uploads, and responsive document layouts

10hViews 733Likes 13Bookmarks 6
joshpuckett@joshpuckett

@kushalbyatnal so useful! man, the amount of times I've designed these components... so great to have a simple, well-made lib for them 👏

10hViews 679Likes 10Bookmarks 3
Kushal Byatnal@kushalbyatnal

React Excel viewer component for previewing XLSX workbooks with sheet tabs, frozen panes, formulas, large-grid navigation, and cell selection

10hViews 590Likes 6Bookmarks 2
Kushal Byatnal@kushalbyatnal

React DOCX editor component for editing Word documents with a Word-style toolbar, import and export, formatting controls, page thumbnails, links, images, tables, and tracked changes

10hViews 464Likes 5Bookmarks 1
Kushal Byatnal@kushalbyatnal

and of course, a massive shoutout to @andrewlu0 who built these!

wouldn't have been possible without him, and it's really his vision come to life

10hViews 465Likes 6
Dan Nelson@danimalnelson

@kushalbyatnal Love all the work people are putting into shared, open source tools so we can all move faster. Nice work.

9hViews 208Likes 4

@kushalbyatnal extend eng team just loves our customers so much they had to

10hViews 189Likes 4
Teddy Ni@Teddarific

@kushalbyatnal this is fireeee @andrewlu0

9hViews 107Likes 4

@kushalbyatnal oh man these are SO good, great launch guys!

10hViews 226Likes 3
scott@the_doc_doctor

@kushalbyatnal god bless you @andrewlu0

10hViews 109Likes 3
Hazli Johar@hazlijohar

@kushalbyatnal GOATED I NEED THISS

8hViews 104Likes 3

@kushalbyatnal looks so good

10hViews 76Likes 3
Oleg Akbarov@olegakbarov

@kushalbyatnal amazing work!

9hViews 131Likes 2
Greg Charles@gcharles10x

@kushalbyatnal @jxnlco 🔥

8hViews 26Likes 2
Mathew Chan@itsmattchan

@kushalbyatnal Very cool project

8hViews 17Likes 2
Mike Bedarev@mikebedarev77

@kushalbyatnal It’s almost… too easy?

9hViews 35Likes 1
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