Life & fun · alternatives · 2026

Kata is a JSON templating engine for JavaScript that uses marked blocks to process templates. It supports ten block types including templates, interpolation, iteration, conditionals, function invocation, and imports… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Kata – A Template Engine for Javascript launched in 2014; newer entries below may have overtaken it.

1. 1
   Editor.js▲723

   A block-styled editor with clean JSON output

   2019 · editorjs.io · its alternatives →

2. 2
   Bourbon Engine▲91

   Build fully native UIs in JSON and push them live instantly.

   2019 · its alternatives →

3. 3
   Mizu.js – Lightweight HTML templating library for any-side rendering▲225

   Hey HN, I'd like to share a fun project I've been working on: mizu.js. It's a js library that add functional attributes support into your html, designed to be a simple and flexible alternative to fully-fledged web frameworks (such as Vue, React, and Angular), while offering more capabilities than other lightweight options (like Alpine.js and htmx). As it's written using modern ES features and due to its isomorphic nature, it can be run in both browsers and runtimes (Node, Deno, Bun) without any changes. This makes it ideal for client-side and server-side rendering, as well as static site…

   2024 · mizu.sh · its alternatives →

4. 4
   Askama – Type-safe, compiled Jinja-like templates for Rust▲82

   The original askama repo, please go to https://github.com/askama-rs/askama - askama-rs/askama-old

   2017 · github.com · its alternatives →

5. 5
   JSON Generator▲139

   Create mock and sample JSON using a powerful template syntax

   2014 · json-generator.com · its alternatives →

6. 6
   A django-inspired JavaScript templating system▲14

   Spicy templating for node and the browser inspired by Twig, Dust.JS and Hogan.JS - deoxxa/node-ginger

   2012 · github.com · its alternatives →

7. 7GJ
   Generate JSON mock data for testing/initial app development▲103

   Easily create complex JSON data structures using intuitive templates.

   2023 · jsongenerator.io · its alternatives →

8. 8
   JSON Master▲82

   Format, repair, convert, and visualize JSON, XML, YAML, CSV, and TOML. Free developer platform with advanced visualizers and AI-powered syntax repair.

   2020 · jsonmaster.com · its alternatives →

9. 9
   Jason – A new JSON Library for Go▲106

   Easy-to-use JSON Library for Go. Contribute to antonholmquist/jason development by creating an account on GitHub.

   2014 · github.com · its alternatives →

10. 10
    CalDOM: An agnostic, reactive and minimalist JavaScript UI library▲107

    An agnostic, reactive & minimalist (3kb) JavaScript UI library with direct access to native DOM.

    2021 · caldom.org · its alternatives →

11. 11
    Boxwood – simple templating engine for JavaScript, in JavaScript▲59

    Hey! A while back, I wrote a templating engine (MIT License), which I mostly use for small side projects, either static or ssr generated. Simplicity is one of the main goals. I'll be happy to answer any questions. The main goal for sharing it is to simply get some feedback. Best, Emil

    2024 · github.com · its alternatives →

12. 12
    JSON to Swift, JAVA, PHP and C# and Many▲6

    Template driven online code generator from json to model

    2019 · its alternatives →

13. 13JA
    JsonTree, a 3.53kb JavaScript tool for generating html trees from JSON▲78

    a lightweight dependency free javascript micro-library for making collapsable trees with JSON

    2017 · maxleiter.github.io · its alternatives →

14. 14GD
    GolemUI – Declarative Form Engine▲53

    We're a team of three friends who have been working with forms and Open Source for a decade, and we joined forces together to create something where we can apply all of our experience. We recently released GolemUI, an Open Source library to generate forms dynamically from JSON definitions, with a typed layer to simplify authoring. This library has a lot to offer. These are the main characteristics: 1. A JSON engine. The form is governed by a JSON definition that you can store in a DB, version, diff, or generate it with LLMs as a validated JSON. 2. We provide also 28 headless components (and…

    Jul 2026 · golemui.com · its alternatives →

15. 15
    Object-visualizer – Chrome-console-like JSON object visualizer in DOM▲45

    Vue JSON inspector with Chrome-like theme. Contribute to soc221b/object-visualizer development by creating an account on GitHub.

    2020 · github.com · its alternatives →

16. 16
    jsoncafe▲6

    Advance template driven Model Class Generator Swift,Java etc

    2018 · its alternatives →

17. 17
    js.spec, a JavaScript implementation of clojure.spec▲96

    clojure.spec for Javascript. Contribute to prayerslayer/js.spec development by creating an account on GitHub.

    2016 · github.com · its alternatives →

18. 18HH
    HyTags – HTML as a Programming Language▲69

    This is hyTags, a programming language embedded in HTML for building interactive web UIs. It started as a way to write full-stack web apps in Swift without a separate frontend, but grew into a small language with control flow, functions, and async handling via HTML tags. The result is backend language-agnostic and can be generated from any server that can produce HTML via templates or DSLs.

    Jan 2026 · hytags.org · its alternatives →

19. 19
    JSON Editor 1.0▲78

    Effortless JSON Editing, Anywhere!

    2023 · chromewebstore.google.com · its alternatives →

20. 20NA
    nunjucks, a better templating system for javascript (jinja2 inspired)▲38

    2012 · nunjucks.jlongster.com · its alternatives →

21. 21
    Ferrum.js – Rust features in JS: traits and advanced iteration▲63

    Features from the rust language in javascript: Provides Traits/Type classes & a hashing infrastructure and an advanced library for working with sequences/iterators in js - adobe/ferrum

    2019 · github.com · its alternatives →

22. 22
    I created a lightweight JavaScript library to visualize JSON as a graph▲62

    Effortlessly visualize JSON structures as dynamic tree diagrams - The-01-Company/jsontr.ee

    2024 · github.com · its alternatives →

23. 23CB
    Compiled, buildtime atomic CSS in JavaScript and all your favorite APIs▲47

    2021 · compiledcssinjs.com · its alternatives →

24. 24JA
    JSONScript – Asynchronous scripting language using JSON format▲49

    2016 · json-script.com · its alternatives →

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 →