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Growth · alternatives · 2026

24 alternatives to A new browser for web developers and designers

Polypane has everything a browser has, plus all the tools you need to build responsive, fast, accessible, and SEO-friendly websites and apps, with multi-viewport synchronised previews and accessibility tooling.

Polypane is a browser designed specifically for web developers and designers. It allows users to view and test multiple website layouts simultaneously, streamlining the design and debugging process across different… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. A new browser for web developers and designers launched in 2019; newer entries below may have overtaken it.

  1. 1
    Polypane▲192

    The browser for building great web experiences

    2019 · polypane.app · its alternatives →

  2. 2

    Cross-platform responsive design and dev browser

    2017 · polypane.app · its alternatives →

  3. 3

    A notebook for building interfaces with Tailwind & shadcn/UI

    2024 · layouts.dev · its alternatives →

  4. 4AV

    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!

    2022 · dev.aspect.app · its alternatives →

  5. 5
    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!

    2025 · 21st.dev · its alternatives →

  6. 6
    Polymet▲622

    AI product designer

    2024 · polymet.ai · its alternatives →

  7. 7
    Sizzy▲876

    The browser for designers and developers

    2019 · sizzy.co · its alternatives →

  8. 8WB
  9. 9P1
  10. 10
    Poly▲425

    Generate design assets in seconds with AI

    2022 · poly.app · its alternatives →

  11. 11
    Subframe▲756

    The best way to build UI, fast

    2024 · subframe.com · its alternatives →

  12. 12
    Polypad▲83

    Scriptable textpad for developers

    2022 · its alternatives →

  13. 13

    Develop responsive web-apps 5x faster

    2020 · responsively.app · its alternatives →

  14. 14

    Try your design ideas in seconds with a universal visual CSS editor that generates code for you. Say hello to speed, joy, and stunning designs in just a few clicks with CSS Pro

    2023 · csspro.com · its alternatives →

  15. 15
    WeWeb▲537

    Create websites faster with a next-generation visual builder

    2021 · weweb.io · its alternatives →

  16. 16WD
  17. 17

    Create beautiful illustrations, no design skills needed

    2021 · visual.app · its alternatives →

  18. 18DA

    Hello HN! We’re Leo and Mandeep, founders of Datapane (https://datapane.com). We're building a way to create reports, dashboards, and web apps from your existing data using Python. Think of it as a combination of React and htmx, specifically designed for the Python data stack. Our GitHub is https://github.com/datapane/datapane and you can try building a report or app in ~2 minutes on Codespaces: https://try.datapane.com We started building Datapane at our previous start-up, where we struggled to deliver ML model results to clients. Much to our…

    2023 · its alternatives →

  19. 19

    PolyBrowser, the "Panoramic" Web Browser. Contribute to PolySuite/PolyBrowser development by creating an account on GitHub.

    2015 · github.com · its alternatives →

  20. 20

    Generate the website

    2021 · shuffle.dev · its alternatives →

  21. 21
    slashB▲97

    The browser for web developers

    2020 · its alternatives →

  22. 22

    A new way to browse the web

    2014 · polybrowser.com · its alternatives →

  23. 23
    OpenUI▲543

    Describe UI and see it rendered live

    2024 · github.com · its alternatives →

  24. 24

    Build flexible, responsive layouts - without writing code

    2016 · flexbox.webflow.com · 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 →