Life & fun · 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. Ast.run – WebAssembly playground launched in 2016; newer entries below may have overtaken it.

1. 1
   I built a WASI playground for running CLI binaries in the browser▲115

   Run WebAssembly made for outside the browser, inside the browser.

   2022 · runno.dev · its alternatives →

2. 2AW
   A WebAssembly game demo▲251

   2017 · funkykarts.rocks · its alternatives →

3. 3
   runnable▲86

   A sandbox service that replaces Staging, QA, & Test servers

   2015 · runnable.io · its alternatives →

4. 4GP
   Go playground powered by WASM that runs in the browser▲140

   2021 · go-playground-wasm.vercel.app · its alternatives →

5. 5
   Runnable▲66

   Run your code online.

   2014 · runnable.com · its alternatives →

6. 6
   Astrum▲172

   A lightweight pattern library for any web project

   2016 · astrum.nodividestudio.com · its alternatives →

7. 7
   WebAssembly▲86

   New binary format for compiling applications for the web

   2015 · github.com · its alternatives →

8. 8
   Runbook▲81

   Free automated DevOps with IFTTT-style mitigation of alerts

   2014 · runbook.io · its alternatives →

9. 9
   BitRun▲70

   Run, embed and share code snippets

   2016 · its alternatives →

10. 10
    Offline JS Playground▲98

    Write, run, and test JavaScript snippets & JSON offline

    Aug 2026 · chromewebstore.google.com · its alternatives →

11. 11
    Wasmer – A Go library for executing WebAssembly binaries▲44

    🐹🕸️ WebAssembly runtime for Go. Contribute to wasmerio/wasmer-go development by creating an account on GitHub.

    2019 · github.com · its alternatives →

12. 12
    Run – Easily manage and invoke small scripts and wrappers▲107

    Task runner that helps you easily manage and invoke small scripts and wrappers - TekWizely/run

    2019 · github.com · its alternatives →

13. 13
    Runscope▲115

    Automated API Testing and Monitoring

    2014 · runscope.com · its alternatives →

14. 14
    Gondola▲69

    The web framework for Go programming language

    2014 · its alternatives →

15. 15
    Teh Playground▲87

    Rapid online PHP prototyping

    2016 · beta.tehplayground.com · its alternatives →

16. 16IG
    Interactive Go REPL in Your Browser with WebAssembly▲8

    2018 · gopry.rice.sh · its alternatives →

17. 17WC
    WebAssembly Cloud – I created a playground in the browser using Rust▲5

    2021 · webassembly.cloud · its alternatives →

18. 18
    RunRun.it▲56

    Professional Task Management

    2014 · its alternatives →

19. 19WS
    Webassembly.sh – WebAssembly WASI Terminal on your Browser▲8

    WebAssembly.sh: an online WebAssembly terminal to run WASI modules directly on your browser

    2019 · webassembly.sh · its alternatives →

20. 20
    WebAssembly runtime embedded in Godot game engine▲32

    A WebAssembly runtime embedded in Godot game engine projects. Interact with Wasm modules from GDScript. Accessing Wasm modules via GDScript provides the following benefits. - Sandboxed environment allows safely loading zero-trust mods/extensions to a project. - Single target means that Wasm modules can be built from any language e.g. Rust, Go, AssemblyScript and the single binary can be run on all platforms. - Fast execution compared to GDScript allows for offloading compute-heavy operations or running bots/mods/etc. at high FPS. This might be useful for loading mods, bot AI,…

    2023 · github.com · its alternatives →

21. 21
    I built a WASM-console using WebAssembly and tinygo▲18

    a very (x 10) basic wasm console. Contribute to rajatjindal/wasm-console development by creating an account on GitHub.

    2024 · github.com · its alternatives →

22. 22
    Run, learn, and debug x86-64 Assembly code directly from your browser▲12

    I recently created this project to teach assembly, and to have an assembly playground in the style of codepen/jsfiddle to embed in my blog posts. It's based on a wasm version of the blink x86-64 emulator, so everything runs client side with no backend server and with a runtime of only ~200Kb

    2024 · x64.halb.it · its alternatives →

23. 23IC
    I create online gnuplot playground using WebAssembly▲8

    2024 · gnuplot.io · its alternatives →

24. 24AV
    A very simple http “proxy” on runkit▲5

    2017 · runkit.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 →