🚀 I Built a Full JSON Developer Tools Platform with Angular (And You Can Use the Source Code)

Mareeswaran Ponraj — Thu, 12 Feb 2026 10:40:08 +0000

As developers, we constantly work with JSON.

Formatting it.
Validating it.
Comparing versions.
Generating models.
Checking schemas.

And most of the time… we open multiple different tools across different websites.

That got me thinking:

👉 Why not build a single modern platform with all JSON utilities in one place?

So I did.

Today I want to share what I built, how I built it, and how you can use the full source code if you want to launch your own developer tools platform.

🌐 Live Application

You can try it here:

https://devjsontools.com/

No login required.
Runs fully in browser.
No data stored on server.

✨ What The Platform Does

This is not just a formatter — it’s a full developer toolkit.

Included tools

✔ JSON Formatter & Beautifier
✔ JSON Validator with error highlighting
✔ JSON Diff comparison
✔ JSON Schema Validator
✔ JSON → Code Generator
✔ Tree view navigation
✔ Auto fix invalid JSON
✔ Export options

Everything inside one clean interface.

🧠 Why I Built This

I wanted a tool that is:

Fast
Privacy friendly
Modern UI
Developer focused
Extensible
SaaS ready

Most online tools are either:

outdated UI
limited features
heavy ads
slow performance

So I built something cleaner and production-ready.

⚙ Tech Stack

Built using modern Angular architecture:

Angular standalone components
TypeScript
Modular feature structure
Responsive UI
Client-side processing
Clean scalable architecture

The project is structured so it can easily become:

✔ SaaS product
✔ Developer platform
✔ Internal company tool
✔ White-label solution

🏗 Architecture Approach

Each tool is built as an independent feature module:

features/
   formatter/
   validator/
   diff/
   schema/
   generator/

Shared UI components are reusable.

State is handled locally (no heavy global store required).

This keeps the app:

maintainable
scalable
easy to extend

💡 Challenges I Faced

Handling Large JSON Efficiently

Rendering large objects without UI freeze required optimized parsing and formatting logic.

Clean Error Detection

Providing meaningful validation feedback instead of generic parsing errors.

Diff Visualization

Making comparison readable and developer friendly.

Performance

Everything runs in browser — no backend processing.

📦 Why I’m Sharing The Source Code

Many developers want to build tools like this but don’t want to start from scratch.

So I packaged the entire production-ready project.

You can:

✔ launch your own JSON tools website
✔ build SaaS on top of it
✔ customize features
✔ use internally
✔ white-label it

💻 Get The Full Source Code

If you want the complete Angular project:

👉 Get Source Code Here

Includes:

Full project structure
Installation guide
License
Documentation
Ready to run setup

🚀 Possible Extensions

If you want to expand it, you can add:

API tester
Mock server generator
AI JSON repair
Team workspace
Cloud storage
Paid premium features

Architecture supports growth.

🙌 Final Thoughts

Building developer tools is fun — but turning them into a usable platform is even better.

This project helped me explore:

modular Angular architecture
performance optimization
developer UX design

If you try the tool, I’d love feedback.

And if you want to build your own version — the source code is available.

Happy coding 👨‍💻

Angular #WebDevelopment #JSON #DeveloperTools #SaaS #IndieDev

DEV Community: Mareeswaran Ponraj