Dev tools · alternatives · 2026

24 alternatives to ReX.js

Built RegExps in chainable, functional way with JS!

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. ReX.js launched in 2018; newer entries below may have overtaken it.

1. 1WP
   Weekend project, Intro.js▲716

   2013 · usablica.github.com · its alternatives →

2. 2
   Regex library▲276

   A curated list of most commonly used regular expressions

   2022 · uibakery.io · its alternatives →

3. 3
   ScrapScript – A tiny functional language for sharable software▲503

   Hi friends, I started casually working on scrapscript in 2015. I built a few compilers over the years to test out various ideas/implementations, and I think I'm finally happy with the overall design. The code is not public yet. Email me at [email protected] if you're interested in joining the core team later this year. Let me know if you have any questions or feedback :)

   2023 · scrapscript.org · its alternatives →

4. 4
   Matches.js -- Powerful Pattern Matching for Javascript▲96

   Powerful pattern matching for Javascript. Contribute to natefaubion/matches.js development by creating an account on GitHub.

   2012 · github.com · its alternatives →

5. 5
   Rex, a parallel functional language for scientific workflows▲28

   https://peterkelly.github.io/rex/

   Aug 2026 · github.com · its alternatives →

6. 6
   Using functions to construct Regex in Python▲105

   Python to Regex. Regex to Python. The yRegex for humans. - iogf/crocs

   2017 · github.com · its alternatives →

7. 7
   Intro.js v2.0▲328

   Javascript framework for adding guide and screen tips

   2015 · usablica.github.io · its alternatives →

8. 8AC
   A complete Bash parser in JavaScript transpiled from Go▲89

   2018 · npmjs.com · its alternatives →

9. 9
   Chart.js▲263

   Simple, clean & engaging charts for designers and developers

   2014 · chartjs.org · its alternatives →

10. 10
    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 →

11. 11WJ
    Way.js – Simple, persistent, framework-agnostic two-way databinding▲162

    2014 · gwendall.github.io · its alternatives →

12. 12
    Danfo.js▲109

    Open Source JavaScript library for manipulating data.

    2020 · github.com · its alternatives →

13. 13
    RegexLearn▲328

    Learn RegEx step by step, from zero to advanced

    2021 · regexlearn.com · its alternatives →

14. 14
    RegExr 2.0▲101

    Online tool to learn, build, & test Regular Expressions

    2014 · regexr.com · its alternatives →

15. 15
    Learn Regular Expressions with simple, interactive exercises▲144

    RegexOne provides a set of interactive lessons and exercises to help you learn regular expressions

    2020 · regexone.com · its alternatives →

16. 16OA
    OxJS - a JavaScript Library for Web Applications▲44

    2012 · oxjs.org · its alternatives →

17. 17
    An experimental data-flow analysis tool for JavaScript▲95

    Find the origin of any character in the DOM

    2019 · fromjs.com · its alternatives →

18. 18
    Faster.js – a micro-optimizing JavaScript compiler▲89

    faster.js is a Babel plugin that compiles idiomatic Javascript to faster, micro-optimized Javascript. - vzhou842/faster.js

    2018 · github.com · its alternatives →

19. 19
    Swap.js – a JavaScript micro-framework (HTML fragments over the wire)▲127

    Hi HN! I created this lib in the need of a simple and tiny framework to easily do AJAX-style navigation / replacement of fragments in the page, in a web application. For people who don't want to use client-side-rendering and complex frameworks à la React, there are nowadays a few "HTML-over-the-wire" libraries, like HTMX, Unpoly or this super-tiny one Swap.js :) One other key thing is that no external tool is needed: no bundler, no webpack, no TypeScript compiler, no minification needed. Just write HTML, JS (+ your preferred server-side language: PHP, Python, etc.) and it works. The…

    2023 · github.com · its alternatives →

20. 20
    ProppyJS▲92

    Functional props composition for UI components (React & Vue)

    2018 · proppyjs.com · its alternatives →

21. 21
    JS-Restructure, a Go-Restructure JavaScript clone▲12

    JavaScript matching REs into objects. Contribute to benjamingr/js-restructure development by creating an account on GitHub.

    2016 · github.com · its alternatives →

22. 22CB
    Compiled, buildtime atomic CSS in JavaScript and all your favorite APIs▲47

    2021 · compiledcssinjs.com · its alternatives →

23. 23AJ
    A JavaScript UI library for imperative JSX▲41

    I've been building a web UI library for a side project of mine. I thought it might be useful to others, so I'm releasing it as open source. To put it simply, I realized that most of my pain points with React come from its declarative model ui=f(state). So I'm trying something that I'm calling "imperative JSX." Instead of treating JSX as the source of truth for your UI, it essentially becomes a query interface for DOM manipulation. I first had the idea for it a few months ago, and only began writing it in earnest last week, so it's extremely early and nowhere near production-ready. Still, I'd…

    2024 · npmjs.com · its alternatives →

24. 24HJ
    hr.js - Build large client-side applications in a structured way▲69

    2013 · friendcode.github.io · 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 →