{
  "id": 18553654,
  "title": "We Open Sourced Our Core .NET JSON Data Mapping Engine (MIT Licensed)",
  "url": "https://urgent.news/2026/11/06/we-open-sourced-our-core-net-json-data-mapping-engine-mit-licensed",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-11-06T19:32:19.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/farazahmed614/we-open-sourced-our-core-net-json-data-mapping-engine-mit-licensed-1fpf"
  },
  "original_language": "en",
  "account": "Hey DEV! 🙋♂️\n\nGood news for .NET developers and data pipeline builders! We've made the core engine of our visual JSON mapping tool open source under the MIT license. This powerful engine, which powers SpanFlow's cloud-based pipelines, is now available for anyone to use, embed in their own applications, or self-host using Docker.\n\nWhat's included?\n- MIT-licensed mapping libraries compatible with .NET Standard 2.0, .NET 8, .NET 9, and .NET 10. This means it works across modern .NET versions and even on older .NET Framework 4.7.2+.\n- The execution engine for performing JSON-to-JSON transformations, just a few lines of code away.\n- A visual designer UI that can be run locally via Docker, requiring no setup or sign-in.\n\nGetting started is simple:\n1. Add the necessary NuGet packages to your .NET project to start using the engine.\n2. Run the visual designer locally with a single Docker command.\n3. Test the engine instantly through a free web playground without any installation.\n\nWe're excited about this open-source release and welcome contributions from the community. Explore the GitHub repository, report bugs, suggest features, or dive into the engine tests. Let us know your thoughts and any specific JSON mapping challenges you'd like help with!",
  "summary": "We Open Sourced Our Core .NET JSON Data Mapping Engine (MIT Licensed) published: true description: The data transformation engine running inside SpanFlow pipelines is now open source. Use it in your .NET projects, self-host the designer via Docker, or test it in the playground. tags: dotnet, opensource, webdev, showdev cover_image: https://dev.to Hey DEV! 👋 If you build web apps or data…",
  "key_points": [
    "Core .NET JSON mapping engine open sourced under MIT license",
    "Compatible with .NET Standard 2.0, .NET 8, 9, 10, and .NET Framework 4.7.2+",
    "Visual designer UI available via Docker for local testing"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}