Dev tools · alternatives · 2026

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. WebDen – open-source, PWA JSFiddle alternative designed for mobile launched in 2021; newer entries below may have overtaken it.

1. 1
   WebDen▲119

   Open source web code playground built for mobile

   2021 · webden.dev · its alternatives →

2. 2
   Impulse▲84

   Dynamic JS Animations for the Mobile Web

   2014 · impulse.luster.io · its alternatives →

3. 3
   Apache Weex▲127

   A framework for building mobile cross-platform UIs

   2017 · incubator.apache.org · its alternatives →

4. 4
   JavaScript Air: Progressive Web Apps▲63

   Bring the best of mobile sites and native apps to your users

   2016 · javascriptair.com · its alternatives →

5. 5
   NW.js▲77

   A new way of writing desktop apps with Web technologies

   2015 · nwjs.io · its alternatives →

6. 6
   Squints▲81

   Design tools for the live web

   28d ago · squints.app · its alternatives →

7. 7QT
   Quokka – The Live Scratchpad for JavaScript▲8

   2017 · medium.com · its alternatives →

8. 8
   StringBean – Barebones CSS Framework for Mobile to 4k Devices▲8

   2015 · github.com · its alternatives →

9. 9AV
   A vanilla JavaScript alternative to the buggy vh/vw CSS units▲8

   2015 · joaocunha.github.io · its alternatives →

10. 10TF
    Tool for diffing websites and mockups – Matchstick▲9

    2020 · matchstick.xyz · its alternatives →

11. 11
    Drul.js – A simple library to create HTML grid layouts▲5

    2017 · github.com · its alternatives →

12. 12
    A cross-platform JavaScript editor and runtime for local-first web app▲5

    Beta Soon Follow me on X @cp_lepage and @get_fullstacked

    2024 · twitter.com · its alternatives →

13. 13
    Linux-based OS with HTML, CSS, JS, and JSON environment▲8

    May 2026 · github.com · its alternatives →

14. 14PW
    Progressive Web App “An Easy Programming Language”▲5

    2018 · easyprog.app · its alternatives →

15. 15AN
    A No-JavaScript iOS Browser▲6

    2023 · praxis.a6s.nz · its alternatives →

16. 16
    Natto – a canvas for writing and manipulating JavaScript▲5

    2021 · natto.dev · its alternatives →

17. 17RW
    Realtime Web UI for Chrome Headless▲6

    2019 · deepstream.live · its alternatives →

18. 18SA
    Sandbox – A lightweight CSS only framework▲7

    2019 · dlcnine.github.io · its alternatives →

19. 19
    Simple framework for JavaScript apps▲7

    2019 · github.com · its alternatives →

20. 20
    Unobtrusive JavaScript framework for server-side applications▲6

    2017 · unpoly.com · its alternatives →

21. 21CA
    Cash – An absurdly small jQuery alternative for modern browsers▲9

    2014 · kenwheeler.github.io · its alternatives →

22. 22
    Prettier 1.0▲11

    An opinionated JavaScript formatter

    2017 · github.com · its alternatives →

23. 23
    Scratchpad.io▲8

    A realtime HTML + CSS editor.

    2016 · dash.generalassemb.ly · its alternatives →

24. 24AW
    Ajaxy webapp (side project) for making css web logos or fonts▲7

    2011 · fontorie.com · its alternatives →

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 →