nowfound

Dev tools · November 21, 2021

Runno

Make embeddable code snippets that run in the browser

Runno launched on November 21, 2021 with 148 votes, #228 of 2,925 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 4 years on.

Visit runno.dev ↗Runno alternativestop 8% of November 2021

What it does

Runno helps you make embeddable code snippets that run in the browser with WASM. It supports snippets in Python, JS, C/C++ and more. Plus with the Runno NPM package you can run and test arbitrary code in your blog, tutorials or resources.

An open-source sandbox that runs inside and outside the browser.

Does a similar job

all alternatives →
  • I built a WASI playground for running CLI binaries in the browser2022 · runno.dev · ▲115

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

  • snippet.run2024 · snippet.run · ▲149

    Run your code, from the cloud on your computer

  • NJ
    Node.js video tutorials where you can edit and run the code2025 · ▲258

    Hey HN, I'm Sindre, CTO of Scrimba (YC S20). We originally launched Scrimba to make video learning more interactive for aspiring frontend developers. So instead of passively watching videos, you can jump in an experiment with the code directly inside the video player. Since launch, almost two million people have used Scrimba to grow their skills. However, one limitation is that we've only supported frontend code, as our interactive videos run in the browser, whereas most of our learners want to go fullstack—building APIs, handling auth, working with databases, and so forth. To fix this, we…

  • Cliprun2025 · ▲110

    Run Python code from any website with a right-click

  • Run – a CLI universal code runner I built while learning Rust2025 · github.com · ▲96

    Hi HN — I’m learning Rust and decided to build a universal CLI for running code in many languages. The tool, Run, aims to be a single, minimal dependency utility for: running one-off snippets (from CLI flags), running files, reading and executing piped stdin, and providing language-specific REPLs that you can switch between interactively. I designed it to support both interpreted languages (Python, JS, Ruby, etc.) and compiled languages (Rust, Go, C/C++). It detects languages from flags or file extensions, can compile temporary files for compiled languages, and exposes a unified REPL…

  • RunPython.Live2021 · ▲89

    Run Python code in browser

More dev tools this month

the category →
  • /dev/null▲481

    a social network for devs

    Dev tools · 2d ago · dev-null.sh

  • open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

    Dev tools · 27d ago · github.com

  • Contribute to reladraw/reladraw development by creating an account on GitHub.

    Dev tools · 25d ago · github.com

  • OpenBot▲362

    Grok Bot alternative: free, local, open-source, multiplayer

    Dev tools · 22d ago · openbot.run

  • Talanoa▲341

    Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

    Dev tools · 20d ago · talanoa.email

  • CoreSpeed▲332

    One MCP for everything your agents need: apps, memory, tools

    Dev tools · 27d ago · corespeed.io

Source: Product Hunt launch ↗

Launched alongside, November 2021

the whole month →