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Dev tools · alternatives · 2026

24 alternatives to DotNetFiddle – JsFiddle for .Net

Test your C# code online with .NET Fiddle code editor.

DotNetFiddle is an online code editor that allows developers to test and run C# code directly in a web browser without local setup. It provides an accessible environment for writing, executing, and sharing .NET code… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. DotNetFiddle – JsFiddle for .Net launched in 2013; newer entries below may have overtaken it.

  1. 1

    The online code editor for web development

    2018 · codesandbox.io · its alternatives →

  2. 2

    Inspired by the design and UI/UX of apps like Notion, and utility of open-source apps like StackEdit, I decided to create a minimalistic, local-only WYSIWYG Markdown editor. Some features worth highlighting: - Monaco editor and Prettier integration for code snippets - Tables (apparently the holy grail of WYSIWYG editing) - Embeds (for CodePen, CodeSandbox and YouTube, most useful for HTML or JSON exports) - Accepts Markdown paste-in, and "exports"/generates HTML, Markdown and JSON outputs - Collaboration (with real-time awareness and initial commenting system, available only when…

    2023 · editor.vrite.io · its alternatives →

  3. 3

    Anyfiddle, the online code editor for everyone

    2020 · anyfiddle.com · its alternatives →

  4. 4
    glot.io▲261

    An open source pastebin with runnable snippets and API

    2016 · glot.io · its alternatives →

  5. 5

    Easy snippets of code essentials and generators

    2017 · webcode.tools · its alternatives →

  6. 6

    A private, browser-only ClojureScript playground powered by the self-hosted compiler.

    2016 · cljsfiddle.com · its alternatives →

  7. 7

    I've been working for a good 9 months now writing a .net to C transpiler (https://github.com/KallDrexx/dntc) as a "I wonder if I can" type of project (with the intention of eventually being able to do embedded development in C# instead of C). Along the way I was trying to find good milestones to test the transpiler with. As I learned about Linux eBPF I realized that ended up being an interesting use case and created the DotnetEbpf prototype. It allows you to write Linux kernel side eBPF applications fully in C#. While with some of the limitations it may seem like it's…

    2025 · github.com · its alternatives →

  8. 8

    You write a standard solution, just like on LeetCode, and run it through the CLI. It identifies the problem by ID or title, executes your code against local test cases, and shows the result. It currently supports around 1.4k problems and multiple languages, including Python, C++, Rust, Java, Go, TypeScript, Swift, and others. The project is still an MVP. System design, SQL, and concurrency problems are not supported yet, but support for more problem types is planned. Made in Haskell!

    Aug 2026 · github.com · its alternatives →

  9. 9
    Dotient▲269

    Your local semantic search app

    Jun 2026 · dotient.com · its alternatives →

  10. 10
    Anyfiddle▲145

    Build, run and share code in any language from your browser

    2021 · anyfiddle.com · its alternatives →

  11. 11

    Codebrowser homepage

    2016 · code.woboq.org · its alternatives →

  12. 12CC

    Chunk co-founder here. We spent the last 2 weeks building this to scratch our own itch: As developers, we often have problems that could be solved just by running a few lines of code. Sometimes, running this code on your local machine is fine. But other time, the code need to run automatically reacting to external events or to run continuously, which means, it needs to run on a server somewhere. So now, you have to find a cloud provider, to package or build the code and finally to deploy it. All of that for what could be literally be 4 lines of code. We couldn’t find an easier way to do…

    2022 · chunk.run · its alternatives →

  13. 13
    DotConfig▲116

    Super simple webpack configuration wizard 🛠️

    2019 · its alternatives →

  14. 14
    Dotsync▲88

    A simple and concise dotfiles synchronizer

    2023 · dotsync.org · its alternatives →

  15. 15IM

    Hey developers I think we're tired of copying and pasting our codes and sharing links using PasteBin, GithubGist, or Slack. What if you could share the codes without copying the link and share them right from your favorite editor? That was the motivation for creating TurboGist. Right now, it's still in the MVP stage, and I'm trying to gather feedback from developers like you. It's available as a beta in the VS Code Extension store. Can you guys check this out? It'd help me a lot. You don't need to pay any penny, 100% FREE. However, I'm working on introducing a self-hosted feature. Besides, a…

    2025 · turbogist.dev · its alternatives →

  16. 16

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

    2020 · github.com · its alternatives →

  17. 17
    JitBlox▲152

    Interactive prototyping of modern web apps without coding

    2024 · jitblox.com · its alternatives →

  18. 18

    An online Javascript code editor 🤖

    2019 · its alternatives →

  19. 19

    Making Web Testing Easier Automated testing on 3000+ desktop & mobile browser at Studio version! Making Web Testing Easier Automated testing on 3000+ desktop & mobile browser at Studio version! Explore product trial and special offers Download TRIAL version to start your full 1 day evaluation now! M

    2017 · browseemall.com · its alternatives →

  20. 20WV
  21. 21

    ChunkHound’s goal is simple: local-first codebase intelligence that helps you pull deep, core-dev-level insights on demand, generate always-up-to-date docs, and scale from small repos to enterprise monorepos — while staying free + open source and provider-agnostic (VoyageAI / OpenAI / Qwen3, Anthropic / OpenAI / Gemini / Grok, and more). I’d love your feedback — and if you have, thank you for being part of the journey!

    Jan 2026 · github.com · its alternatives →

  22. 22
  23. 23

    SharePad is a free online code interview tool, it has a real-time collaborative code editor, you can run code with built-in compilers.

    2021 · sharepad.io · its alternatives →

  24. 24

    Code based data manipulation tool for text, arrays, and JSON

    2023 · sloth.sellersew.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 →