Build a JSON Converter in Kotlin from Scratch | Generate Data Classes for Java, Python, C#, & More
Ever wanted to build your own JSON converter from scratch — with no libraries, no built-in JSON parser, and full control over the output?
In this Kotlin tutorial, you'll learn how to manually parse raw JSON strings using basic string manipulation, and generate clean, ready-to-use data classes for the most popular programming languages:
✅ Generate data classes for:
Kotlin
Java
Python
C#
TypeScript
PHP
📌 What you’ll learn:
Manual JSON parsing using Kotlin (String, Regex, and Map)
Data class generation logic per language
How to handle nested JSON and arrays
Clean formatting of class syntax and properties
Kotlin fundamentals for tool building
🧠 Why No Libraries?
To learn what's happening under the hood and build something that’s 100% yours.
👨💻 Perfect for:
Kotlin learners
Dev tool builders
Backend/API developers
Anyone working with JSON & class generation
📽️ Chapters:
00:00 Intro
01:01 Building Using Libraries Explained
03:48 Understanding the JSON Structure
05:04 Project Setup (Get Started)
34:24 Building the Class Generator
Build JSON converter from scratch Kotlin
Kotlin JSON parser without libraries
Kotlin string manipulation JSON
Generate data classes manually
Kotlin JSON to Java class
JSON to Python class Kotlin
Kotlin regex JSON parser
Code generator in Kotlin
No dependency JSON converter
Pure Kotlin JSON converter
#Kotlin #JSON #CodeGeneration #DeveloperTools #NoLibraries #ManualParsing #BackendDevelopment #OpenSource #TypeSafe #Programming