CodePen-Style React Apps in VS Code

In plain words

This extension enables developers to build and preview React applications directly within VS Code, mimicking the CodePen experience. It's designed for web developers who want to prototype and experiment with React components without leaving their editor. The tool allows real-time preview of code changes, streamlining the development workflow for those working on React projects.

written from the facts on this page · September 2026

• AV
  A Visual IDE for React2022 · dev.aspect.app · ▲479

  I made this because building UIs in a lexical medium like code is super annoying. I have to pre-render what I’m making in my head, and then jump between the browser and IDE to test. I was inspired by the developer console in chrome and safari since I end up editing css there because it’s ironically more convenient. Hope it’s useful!

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  21st.dev2025 · 21st.dev · ▲1,211

  I originally built this app to organize and reuse interesting React + Tailwind components I came across on Twitter, inspired by the shadcn/ui approach. Later, a friend started contributing their own components, and it got me thinking—this could grow into something bigger, like an NPM for design engineers to share and use components. Would love to hear your thoughts!

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  A front-end visual development tool for React applications2020 · github.com · ▲178

  Webcodesk - Web App Builder for Create React App. Contribute to webcodesk/webcodesk-srv development by creating an account on GitHub.

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  React Boilerplate 3.02016 · github.com · ▲370

  Offline-first, highly scalable foundation for your next app

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  v0.dev by Vercel2023 · v0.app · ▲549

  Generate UI with simple text prompts: copy, paste, ship

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  JSX.Design2024 · ▲413

  The dev friendly no-code editor for React development

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  /dev/null▲472

  a social network for devs

  Dev tools · 2d ago · dev-null.sh

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  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 27d ago · github.com

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  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 25d ago · github.com

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  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 22d ago · openbot.run

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  Talanoa▲340

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 20d ago · talanoa.email

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  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 27d ago · corespeed.io

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  remove.bg▲2,028

  Remove image backgrounds automatically in 5 seconds with just one click. Don't spend hours manually picking pixels. Upload your photo now & see the magic.

  Work · 2018 · remove.bg

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  Humaaans▲1,592

  Mix-&-match illustrations of humans with a design library.

  Growth · 2018 · humaaans.com

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  Refactoring UI: The Book▲822

  Make your ideas look awesome, without relying on a designer

  Life & fun · 2018 · refactoringui.com

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  The Y Combinator Database 2.0▲604

  Everything you ever wanted to know about YC companies

  Growth · 2018 · ycdb.co

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  Ouch! Illustrations▲590

  Free illustrations for better UX

  Growth · 2018 · icons8.com

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  Visa List 1.0▲576

  Know where you can travel with your passport tension free ✈️

  Life & fun · 2018 · visalist.io