Free Online C# Class to JSON Generator & Converter

Free Online C# Class to JSON Generator

Application Overview

The C# Class to JSON Generator is a professional, client-side utility designed for developers who need to quickly create JSON sample data based on existing C# POCOs (Plain Old CLR Objects). The tool parses C# property syntax and transforms it into a valid, usable JSON object for API testing or front-end integration.

Core Features

• Live Parsing Engine: Instant conversion logic that extracts variable names and types from C# class syntax.
• Support for Data Types: Handles common C# types like string, int, double, bool, decimal, and DateTime.
• Collection Handling: Detects List<T> or T[] arrays and generates valid JSON array structures.
• One-Click Copy: A high-contrast action button to copy the resulting JSON to the clipboard.
• Formatting Options: A toggle switch for switching between minified and pretty-printed (indented) JSON output.

UI & Design Specification

• Layout: A clean, two-column grid layout (Side-by-side) on desktop. The left pane acts as the input area for C# code; the right pane displays the generated JSON output.
• Theme: Pure light mode. Uses a crisp, clean aesthetic with white backgrounds (#FFFFFF), light grey panels (#F8F9FA), and neutral text (#2D3748). The primary interaction color should be a professional blue (#3182CE).
• Typography: Uses modern sans-serif stack for readability, with monospaced fonts (monospace or Courier New) for the input and output code blocks.
• Responsive Design: On mobile devices, the panes stack vertically (input top, output bottom) to accommodate smaller screens.
• Animations: Subtle, smooth interactions. Input fields should have a gentle focus state change (border color transition). Buttons should feature a slight elevation lift on hover.

Technical Directives

• Single File Architecture: All HTML, CSS, and JS must be embedded within one self-contained .html file. No build steps.
• No Persistent Storage: STRICTLY PROHIBITED from using localStorage, sessionStorage, or cookies. All app state must reside in volatile JavaScript variables.
• Sandboxed Environment: The app will run in an iframe. Do not use alert(), prompt(), or confirm(). If user feedback is required (e.g., 'Copied!'), use a custom-styled, absolutely positioned HTML toast notification.
• Dependencies: Use reliable CDN links for any necessary external scripts (e.g., UI icon libraries). Do not use heavy frameworks like React or Vue; pure Vanilla JS is required for maximum performance and simplicity.