Dev tools · alternatives · 2026
24 alternatives to Program Explorer, a container playground
Inspired by Compiler Explorer and other playground/fiddle websites like jsfiddle, db-fiddle, Go playground, and Rust playground, I thought it would be cool to have a playground for nearly any program so I've been working on Program Explorer: a playground for running programs from containers. I am inspired by these playgrounds because they are great educational tools for quickly experimenting and as communication tools by sharing shortlinks that reproduce bugs for instance. I would love for every open source project that publishes a container to get their own playground for free. I'm…
Program Explorer is a web-based playground for running programs from container images, similar to existing playgrounds for languages like Go and Rust. It allows users to experiment with nearly any open source project… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1AP
2015 · fatiherikli.github.io · its alternatives →
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Wing Playground▲253Iterate on cloud apps in milliseconds, not minutes
2024 · winglang.io · its alternatives →
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This started as a hard requirement for my TUI-based editor application, it ended up going in a few different directions. A suite of tools that help with semantic code entities: https://github.com/odvcencio/gts-suite A next-gen version control system called Got: https://github.com/odvcencio/got I think this has some pretty big potential! I think there's many classes of application (particularly legacy architecture) that can benefit from these kinds of analysis tooling. My next post will be about composing all these together, an exciting project I call…
Feb 2026 · github.com · its alternatives →
- 4GP
2021 · go-playground-wasm.vercel.app · its alternatives →
- 5
I recently dug up an old project in an attempt to improve on it. It's a code sandbox for playing around with HTMX in the browser, that runs a mock server within the sandbox iframe. The server "framework" is loosely based on Django, so if you're familiar with Django, you'll immediately understand what's going on. I recommend clicking through the examples. Github repo: https://github.com/lassebomh/htmx-playground Probably my favorite part is the lack of HTMX specific code. It's designed to mimic the client and server, but really nothing else. In principle, this means that…
2024 · lassebomh.github.io · its alternatives →
- 6
A new creative coding environment in Framer X
2019 · framer.com · its alternatives →
- 7OS
Kshitij and Rahul here. We're building Playground, an open-source sandbox that lets your non-technical teams prototype directly on production codebases, without bugging you (developers) to spin up and maintain another repo. The repo is here: https://github.com/B1u3B01t/design-playground. We've been working together for six years. Last year we built an AI design agent because we thought designers were the biggest bottleneck. But we were wrong. After talking to teams, we realised designers, PMs, founders and even sales people all wanted to quickly change and explore flows…
Jul 2026 · its alternatives →
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Hey, Jared Palmer (creator of this playground) here. Really excited to ship this. I’ve been building this over the past few weeks to compare LLMs from different providers like OpenAI, Anthropic, Cohere, etc. At Vercel, I manage our Frameworks division (including Next.js, Svelte, and Turbo) and wanted to also dogfood some of the latest features in a slightly larger application. This playground takes a lot of inspiration from https://nat.dev and is built on Tailwind, ui.shadcn.com, and some upcoming Vercel products we’re announcing soon. We’re going to continue adding models to…
2023 · play.vercel.ai · its alternatives →
- 9
Hi HN! Korean high school senior here, about to start CS in college. I built a browser engine from scratch in C++ to understand how browsers work. First time using C++, 8 weeks of development, lots of debugging—but it works! Features: - HTML parsing with error correction - CSS cascade and inheritance - Block/inline layout engine - Async image loading + caching - Link navigation + history Hardest parts: - String parsing(html, css) - Rendering - Image Caching & Layout Reflowing What I learned (beyond code): - Systematic debugging is crucial - Ship with known bugs rather than chase…
Jan 2026 · github.com · its alternatives →
- 10
2014 · jessevdk.github.io · its alternatives →
- 11
Sqlime is an online SQLite playground for debugging and sharing SQL snippets.
2021 · sqlime.org · its alternatives →
- 12ES
an exploration in reading and understanding code
2021 · artifacts.bypaulshen.com · its alternatives →
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Simple, fast way to find and try any MCP server. No setup.
Feb 2026 · its alternatives →
- 14
Experience a WordPress that runs entirely in your browser
2023 · developer.wordpress.org · its alternatives →
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VS Code extension for building web applications ("swings") using a interactive and editor-integrated coding environment - lostintangent/codeswing
2020 · github.com · its alternatives →
- 16
MCP Playground▲160MCP Playground is a Postman-style tool for MCP — inspect servers, execute tools live, test your client, all from the browser. Four things in one place: 1. Free hosted MCP servers — four public test servers anyone can point their client at: Echo (connectivity), Auth (Bearer token flow), Error (error handling), Complex (multi-tool schemas).No sign-up, just use the URL. 2. Server inspector — paste any remote MCP server URL, see all its tools/resources/prompts, execute them live, inspect the full JSON-RPC log. HTTP, SSE, and WebSocket all supported. 3. Registry — 10,000+ servers…
Nov 2025 · mcpplayground.io · its alternatives →
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2018 · webflow.com · its alternatives →
- 18PF
2019 · frontendlane.github.io · its alternatives →
- 19
An enjoyable playground for HTML, JavaScript and CSS - d6u/web-playground
2015 · github.com · its alternatives →
- 20
Hi HN! My team at Efficient Computer (https://efficient.computer) and I are working on a new computer architecture and I am leading the team that is building the compiler for our chip. Our hardware is focused on energy-constrained embedded applications and is super efficient, which lets devices run for years on a small (ie AA) battery. We built a playground for our compiler that has a cool visualizer and debugger that shows how your C code (more languages to come) maps to our Fabric architecture, and an energy model that shows you how much less energy your code uses on our…
2025 · efficient.computer · its alternatives →
- 21AP
Write code in Expo's online editor and instantly use it on your phone.
2017 · snack.expo.io · its alternatives →
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Bring testing playground into VS Code
2021 · marketplace.visualstudio.com · its alternatives →
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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 →