Dev tools · alternatives · 2026
24 alternatives to Extend UI – open-source UI kit for modern document apps
We're open-sourcing 14 components & examples today for PDF, DOCX, and XLSX viewers, plus bounding box citations, file upload, e-signature, and more. It's MIT licensed and fully customizable. Demo video here: https://share.extend.ai/kRmSGKRF 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 https://extend.ai/. It was only ever meant to be internal, but enough customers kept asking for it that we decided to…
Extend UI is an open-source MIT-licensed component library containing 14 UI elements designed for document-based applications. It provides viewers for PDF, DOCX, and XLSX files alongside tools for bounding box… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
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Stream UI Kit▲195A beautiful open source Bootstrap 4 UI kit
2018 · htmlstream.com · its alternatives →
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We are working on an open-source .docx editor library for apps that need to edit Word documents in the browser. We just shipped 1.0. A lot of existing approaches convert .docx into HTML and lose document semantics along the way. Our editor parses OOXML directly and uses its own rendering+layout engine to produce paged documents with html/css. Edits round-trip back to .docx, so you’re always editing the document, not its representation. The core rendering engine is framework agnostic, with React and Vue ui adapters on top. It’s Apache 2.0. Happy to answer questions.
May 2026 · github.com · its alternatives →
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Convert semantic HTML fragments to native, editable Word documents (OOXML) - floodtide/dom-docx
Jul 2026 · github.com · its alternatives →
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200+ design resources for your next digital product
2021 · basetemplates.com · its alternatives →
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OpenUI▲322Thesys just open-sourced their generative UI rendering engine. Interesting timing given where Google a2ui and Vercel's json-render are headed. The difference worth noting: a2ui and json-render both treat JSONL as the contract between the LLM and the renderer. Thesys is betting that's the wrong primitive. Their engine uses a code-like syntax (OpenUI Lang) instead — LLM writes it, renderer executes it. The argument is that LLMs are fundamentally better at generating code than generating structured data, so you get cleaner output and ~67% fewer tokens. The broader vision seems to be a…
Mar 2026 · openui.com · its alternatives →
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Handle Extension▲141Refine UI in the browser, feed changes to your coding agent
Apr 2026 · gethandle.ai · its alternatives →
- 10IW
A collection of 100 UI/UX tips that I have collected since 2021
2021 · fifty.user-interface.io · its alternatives →
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UI Design Daily▲3341073 open-source UI designs, updated daily
2020 · uidesigndaily.com · its alternatives →
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UI/UX Assets▲271Curated UI kits, wireframes, templates, icons and more.
2016 · uiuxassets.com · its alternatives →
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Documind is an open-source tool that turns documents into structured data using AI. What it does: - Extracts specific data from PDFs based on your custom schema - Returns clean, structured JSON that's ready to use - Works with just a PDF link + your schema definition Just run npm install documind to get started.
2024 · github.com · its alternatives →
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Radix UI▲233Open-source UI components for building accessible web apps.
2020 · radix-ui.com · its alternatives →
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UX UI Doc Kit▲182Free kit to improve your UX/UI workflow in Sketch & Figma
2020 · tetrisly.com · its alternatives →
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Once UI 1.5▲299When I started my career and built my first design system, I was beyond excited. It took a lot of iterations, learning and 6 months of work to launch it internally. In the next job, I did it again, then at the following job, again… And no matter which company I worked for, 80% of the design system was the same. I’ve decided to work full-time on the design system I’ve always wanted, and today I’m launching and open-sourcing it. You can use it to build Next.js apps faster, and I’ve designed it in a way that it’s hard to go wrong with it: you can choose any settings, and you’ll end up with a…
Dec 2025 · once-ui.com · its alternatives →
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A large database of 100% free UI components and design source files available in formats popular in the industry.
2020 · uidesigndaily.com · its alternatives →
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Rayna UI▲189500+ component library system & UI kit for modern UI design
2023 · v1.raynaui.com · its alternatives →
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All-in-one set of Notion templates for makers
2021 · tsolution.gumroad.com · its alternatives →
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Draft brand new documents to use over API
2025 · useanvil.com · its alternatives →
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Build rich editor UIs faster with React components
2025 · tiptap.dev · its alternatives →
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LangUI▲131Open source UI components tailored for your AI projects
2023 · langui.dev · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →