KSON, a love-letter to the humans maintaining computer configuration
Hi friends, I'm really excited to introduce KSON, which just entered public beta! Anywhere a human is reading or editing YAML/JSON/TOML, KSON may be used as a more effective interface on that data. If you are such a human, we invite you to participate in this beta. tl;dr Check out the website [1], play with the online playground [2], install the library for your programming language [3], edit in your favorite editor [4], discuss and give feedback [5], contribute to the project [6]. (A personal note about this project: I love software. Machines made of words! Such a wonder. KSON…
In plain words
KSON is a configuration language designed as an alternative interface for reading and editing YAML, JSON, and TOML files. Now in public beta, it provides libraries for multiple programming languages and integrates with popular code editors. The project aims to offer a more effective approach to managing computer configuration data for developers and system administrators who work with these formats regularly.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hi friends, I'm really excited to introduce KSON, which just entered public beta! Anywhere a human is reading or editing YAML/JSON/TOML, KSON may be used as a more effective interface on that data. If you are such a human, we invite you to participate in this beta. tl;dr Check out the website [1], play with the online playground [2], install the library for your programming language [3], edit in your favorite editor [4], discuss and give feedback [5], contribute to the project [6]. (A personal note about this project: I love software. Machines made of words! Such a wonder. KSON itself, as a collection of words that both make a machine and explain that machine, is an expression of a lot ideas I feel really passionately about around software and our relationship to it. I've put a lot of love into trying to make that expression eloquent and reliable. I hope some of that comes through clearly, and I look forward to discussing this more over time with anyone who's interested) One of the key things KSON wants to say is: let's keep everything that's great about YAML and JSON as "Configuration User Interfaces", and let's make those interfaces more toolable, robust, and fun. Here's some of the ways we do that: - KSON is a verified superset of JSON, has native JSON Schema support, transpiles cleanly to YAML (with comments preserved!), and is likely available wherever you want it—current supported platforms: JS/TS, Python, Rust, JVM, and Kotlin Multiplatform. - KSON is also widely available in developer tools, with support for VS Code, Jetbrains IDEs, and anywhere you can plug in an LSP. - KSON is fully open source, licensed under Apache-2.0, and you are invited to meet its words and tinker with how they make its machine. A lot of care, craft, attention and joy went into making the KSON project understandable and approachable for developers. We hope to see you around. PS. This is an HN-friendly version of the official announcement at <https://kson.org/docs/blog/2025/09/17/introducing-kson/>. [1]: https://kson.org/ [2]: https://kson.org/playground/ [3]: https://kson.org/docs/install/#languages [4]: https://kson.org/docs/install/#editor-support [5]: https://kson-org.zulipchat.com/ [6]: https://github.com/kson-org/kson
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