Dev tools · alternatives · 2026

24 alternatives to Flintable - Alpha

ESLint fixable rules playground

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Flintable - Alpha launched in 2023; newer entries below may have overtaken it.

1. 1FF
   Flintable – Fixable ESLint rules Playground▲14

   Hi community! I am glad to introduce to you my latest project! What? Flintable is a playground for experimenting lint rules, focusing on fixable layout and suggestions rules. I initially focused on ESLint, the most popular JavaScript linter. Flintable allows adding your code and regularly testing it with individual rules or custom configurations, composing your own configuration file. How? I developed Flintable using the PHP Laravel framework for the server side and the Vue framework linking them with Inertia JS, accompanied by Tailwind CSS for the client side. Laravel Horizon manages the…

   2023 · flintable.com · its alternatives →

2. 2
   Fast.js – faster reimplementations of native JavaScript functions▲323

   Faster user-land reimplementations for several common builtin native JavaScript functions. - codemix/fast.js

   2014 · github.com · its alternatives →

3. 3
   Million Lint▲144

   Identify & fix slow code – Grammarly for performance

   2024 · million.dev · its alternatives →

4. 4
   PlayJS▲138

   Playground JavaScript web, now with superpowers

   2023 · its alternatives →

5. 5
   Wing Playground▲253

   Iterate on cloud apps in milliseconds, not minutes

   2024 · winglang.io · its alternatives →

6. 6
   Flint – Write code your way while ensuring remote consistency▲13

   I just released my biggest project yet: Flint, a language-agnostic Git wrapper that lets developers code using their own formatting preferences locally, while automatically enforcing the project's style on push. No more fighting over tabs vs spaces or dealing with noisy diffs. GitHub: https://github.com/capsulescodes/flint Documentation: https://flintable.com/docs/flint/ Article: https://capsules.codes/en/blog/flintable/en-flintable-introd...

   2025 · github.com · its alternatives →

7. 7
   Million▲169

   Speed up your website by 70%

   2024 · million.dev · its alternatives →

8. 8
   Minified.js – a fully-featured, 4K alternative to jQuery and MooTools▲158

   2013 · minifiedjs.com · its alternatives →

9. 9CP
   Clojure parser and core library in JavaScript, live on CodeCombat▲57

   2014 · vickychijwani.github.io · its alternatives →

10. 10
    CodeCombat▲143

    Learn to Code JavaScript by Playing a Game

    2014 · codecombat.com · its alternatives →

11. 11
    JSLog▲91

    JavaScript & TypeScript playground

    2024 · jslog.app · its alternatives →

12. 12
    CLJS Fiddle – ClojureScript▲82

    A private, browser-only ClojureScript playground powered by the self-hosted compiler.

    2016 · cljsfiddle.com · its alternatives →

13. 13AJ
    A Javascript library to overcomplicate Five▲69

    2014 · jackdcrawford.github.io · its alternatives →

14. 14
    Learn React and D3 in the browser with runnable code playgrounds▲48

    2017 · educative.io · its alternatives →

15. 15OA
    Oxlint – a new JavaScript linter written in Rust▲15

    Oxlint is a JavaScript linter designed to catch erroneous or useless code without requiring any configurations by default. Oxlint is part of the oxc project [1], which is a collection of JavaScript tools written in Rust. [1]: https://oxc-project.github.io

    2023 · oxc-project.github.io · its alternatives →

16. 16AP
    A playground for in-browser interpreters▲79

    2015 · fatiherikli.github.io · its alternatives →

17. 17
    Kodable - Programming Fundamentals for Five Year Olds▲34

    Kodable builds coding confidence, typing skills, and STEM fluency through games kids love. Used by over 50% of U.S. elementary schools.

    2012 · surfscore.com · its alternatives →

18. 18
    JavaScript Playground▲12

    Interactive code editor

    2025 · its alternatives →

19. 19
    markuplint▲62

    Linter that gives peace of mind in your markup

    2021 · markuplint.dev · its alternatives →

20. 20AP
    A parody ESLint plugin with absurd rules▲6

    2023 · dont.ninja · its alternatives →

21. 21PV
    Promise Visualization Playground▲61

    2015 · bevacqua.github.io · its alternatives →

22. 22
    My winter project, BlockLike.js, an educational JavaScript library▲35

    2018 · blocklike.org · its alternatives →

23. 23
    Proselint▲13

    A linter for prose. A smarter grammar & style checker.

    2016 · proselint.com · its alternatives →

24. 24
    A11y Lint▲15

    Accessibility is a journey — make it part of your dev flow

    2025 · 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 →