Code Generation Hub
Generate strongly-typed code from structured data — instantly, in your browser. LangStop covers 3 source formats (JSON, XML, YAML) producing code in 22+ target languages — 66+ generator pages and counting.
What is Code Generation from Data?
Code generation from data is the process of transforming structured data formats — JSON, XML, or YAML — into strongly-typed source code in your programming language of choice. Instead of manually translating API responses, configuration files, or data schemas into class definitions, you feed the raw data into a generator and receive ready-to-use code.
This is an essential workflow for modern development: consuming REST APIs, parsing configuration files, deserializing message formats, and maintaining type safety across service boundaries. LangStop makes this entirely client-side — your data never leaves your machine.
Each generator produces idiomatic code for the target language: Go structs with json/yaml tags, Python dataclasses, TypeScript interfaces, Java POJOs with Jackson annotations, Rust structs with Serde derives, Swift Codable types, and much more.
JSON → Code
23 target languages
/json-to-typescript
/json-to-javascript
/json-to-go
/json-to-rust
/json-to-python
/json-to-java
/json-to-csharp
/json-to-cpp
/json-to-dart
/json-to-kotlin
/json-to-swift
/json-to-php
/json-to-ruby
/json-to-scala
/json-to-haskell
/json-to-elm
/json-to-flow
/json-to-objective-c
/json-to-pike
/json-schema
/json-to-javascript-prop-types
/json-to-typescript-zod
/json-to-typescript-effect-schema
XML → Code
23 target languages
/xml-to-typescript
/xml-to-javascript
/xml-to-go
/xml-to-rust
/xml-to-python
/xml-to-java
/xml-to-csharp
/xml-to-cpp
/xml-to-dart
/xml-to-kotlin
/xml-to-swift
/xml-to-php
/xml-to-ruby
/xml-to-scala
/xml-to-haskell
/xml-to-elm
/xml-to-flow
/xml-to-objective-c
/xml-to-pike
/xml-to-json-schema
/xml-to-javascript-prop-types
/xml-to-typescript-zod
/xml-to-typescript-effect-schema
YAML → Code
23 target languages
/yaml-to-typescript
/yaml-to-javascript
/yaml-to-go
/yaml-to-rust
/yaml-to-python
/yaml-to-java
/yaml-to-csharp
/yaml-to-cpp
/yaml-to-dart
/yaml-to-kotlin
/yaml-to-swift
/yaml-to-php
/yaml-to-ruby
/yaml-to-scala
/yaml-to-haskell
/yaml-to-elm
/yaml-to-flow
/yaml-to-objective-c
/yaml-to-pike
/yaml-to-json-schema
/yaml-to-javascript-prop-types
/yaml-to-typescript-zod
/yaml-to-typescript-effect-schema
Why Automate Code Generation?
Eliminate Manual Translation
Stop hand-writing classes from API docs or data samples. One paste generates production-ready code that matches your data structure exactly.
Guarantee Type Safety
Generated types are consistent with your source data. No mismatched fields, wrong types, or forgotten properties. Your compiler catches issues early.
Accelerate Development
Prototype faster by generating models instantly. Iterate on data shapes and regenerate — no tedious manual updates. Perfect for API-first development.
Maintain Consistency Across Services
Generate equivalent types in multiple languages from the same data source. Keep your frontend TypeScript, backend Go, and mobile Swift/Kotlin models in sync.
Reduce Boilerplate
Skip repetitive typing. Generators produce idiomatic serialization annotations, constructors, and accessor methods — the code you would write anyway, done instantly.
Stay Privacy-First
All generation runs 100% in your browser. No uploads, no servers, no accounts. Your data stays on your machine — always.