Dev tools · alternatives · 2026

Codeblock.js is a dev tool that lets users create editable, runnable JavaScript code blocks directly in the browser. It's designed for developers who need an easy way to write, test, and execute JavaScript snippets… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Codeblock.js - Editable, runnable javascript code blocks launched in 2013; newer entries below may have overtaken it.

1. 1
   Editor.js▲723

   A block-styled editor with clean JSON output

   2019 · editorjs.io · its alternatives →

2. 2AI
   An Isomorphic JavaScript Framework Faster Than React▲337

   2015 · jsblocks.com · its alternatives →

3. 3WP
   Weekend project, Intro.js▲716

   2013 · usablica.github.com · its alternatives →

4. 4
   My winter project, BlockLike.js, an educational JavaScript library▲35

   2018 · blocklike.org · its alternatives →

5. 5
   Blocklike.js Educational Library – So kids can level up from Scratch▲88

   Bridging the gap between block programming and JavaScript. - ronilan/BlockLike

   2019 · github.com · its alternatives →

6. 6
   I made a CLI tool to create web extensions with no build configuration▲381

   Hello HN! I'm the creator and solo developer of Extension.js, a development tool for browser extensions with built-in support for TypeScript, WebAssembly, React, and modern JavaScript. Developers use it to spend less time configuring the compilation config or learning new frameworks and more time actually writing code. Most projects similar to Extension.js rely on some sort of abstraction or configuration to get started, making the initial development process slow given the extra learning curve and setup guidelines. By using Extension.js, adding the package to your npm scripts is all it…

   2024 · github.com · its alternatives →

7. 7
   Airtable Scripting Block▲253

   Write, edit, and run short scripts in Airtable

   2020 · airtable.com · its alternatives →

8. 8
   Codewich – A live-updating TypeScript/CSS/HTML playground▲114

   Create and share simple web demos using TypeScript, CSS, and HTML. Prototype new ideas quickly.

   2017 · codewich.com · its alternatives →

9. 9
   CODECAST▲254

   HTML & CSS editor in your browser with real-time previews

   2015 · codecast.me · its alternatives →

10. 10
    JSRobot▲477

    Learn to code in JavaScript by playing a game 🤖

    2017 · lab.reaal.me · its alternatives →

11. 11BJ
    Behave.js – Coding Behaviors for textarea elements▲180

    2013 · jakiestfu.github.com · its alternatives →

12. 12
    FuckFuckAdblock▲353

    Acts like FuckAdBlock.js but always says that no adblock was detected - GitHub - Mechazawa/FuckFuckAdblock: Acts like FuckAdBlock.js but always says that no adblock was detected

    2015 · github.com · its alternatives →

13. 13
    CodeSwing – A CodePen-like interactive playground, built into VS Code▲159

    VS Code extension for building web applications ("swings") using a interactive and editor-integrated coding environment - lostintangent/codeswing

    2020 · github.com · its alternatives →

14. 14
    Code editor by Flawwwless▲89

    An online Javascript code editor 🤖

    2019 · its alternatives →

15. 15
    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 →

16. 16
    Chart.js▲263

    Simple, clean & engaging charts for designers and developers

    2014 · chartjs.org · its alternatives →

17. 17
    Liveblocks Starter Kit▲305

    Kickstart your Next.js collaborative application

    2023 · liveblocks.io · its alternatives →

18. 18CJ
    Chunkify.js – A functional API to unblock your JavaScript thread▲29

    2015 · yangmillstheory.github.io · its alternatives →

19. 19
    30 seconds of code▲252

    JS snippets that you can understand in 30 seconds or less.

    2018 · github.com · its alternatives →

20. 20
    Execute JavaScript in a WebAssembly QuickJS sandbox▲206

    This TypeScript package allows you to safely execute JavaScript code within a WebAssembly sandbox using the QuickJS engine. Perfect for isolating and running untrusted code securely, it leverages the lightweight and fast QuickJS engine compiled to WebAssembly, providing a robust environment for code execution. Features - *Security*: Run untrusted JavaScript code in a safe, isolated environment. - *File System*: Can mount a virtual file system - *Custom Node Modules*: Custom node modules are mountable - *Fetch Client*: Can provide a fetch client to make http(s) calls - *Test-Runner*: Includes…

    2024 · github.com · its alternatives →

21. 21
    Stitches▲135

    The modern CSS-in-JS library with near-zero runtime.

    2020 · stitches.dev · its alternatives →

22. 22CJ
    Chardin.js, beautiful instructions for apps▲203

    2013 · heelhook.github.com · its alternatives →

23. 23
    CodeDragon▲95

    Learn web development with drag-n-drop HTML/CSS blocks

    2019 · codedragon.org · its alternatives →

24. 24JP
    JavaScript Program Synthesis▲139

    2021 · grgv.xyz · 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 →