Why Use an Online JSON Editor?

While any text editor can open a JSON file, a dedicated online JSON editor adds superpowers: collapsible tree navigation, inline editing, drag-and-drop reordering, instant validation, and format conversion — all without installing anything. It's the go-to tool for developers, QA engineers, and data analysts who work with JSON daily.

Core Features of FavorTool JSON Editor

  • 🌳 Dual View — Switch between raw text editor and interactive tree view.
  • 🔍 Find & Replace — Search within JSON keys and values.
  • ↕️ Sort Keys — Alphabetically sort all keys for consistent output.
  • 🔄 Convert — Transform JSON to CSV, XML, YAML, or TypeScript interfaces.
  • 📜 History — Access your recent editing sessions.
  • 🎭 Escape/Unescape — Handle JSON strings with special characters.

JSON Editor vs JSON Formatter: Which Do You Need?

Use the Formatter when you just need to pretty-print or validate JSON quickly. Use the Editor when you need to actively modify the JSON structure, explore nested data with tree navigation, or convert between formats.

How to Convert JSON to CSV Online

  1. Open FavorTool JSON Editor.
  2. Paste a JSON array of objects (e.g., [{"name":"Alice","age":30},...]).
  3. Click the Convert dropdown → select CSV.
  4. Download the generated CSV file or copy it to clipboard.

Converting JSON to TypeScript Interfaces

One of the most useful features for TypeScript developers: paste any JSON object and instantly generate a typed interface. For example:

// Input JSON:
{"user": {"id": 1, "name": "Alice", "active": true}}

// Generated TypeScript:
interface Root {
  user: User;
}
interface User {
  id: number;
  name: string;
  active: boolean;
}

Tips for Power Users

  • Use Unicode Decode to fix escaped unicode sequences (\u4e2d\u6587 → Chinese characters).
  • Use Sort Keys before diffing two JSON files — it makes differences much easier to spot.
  • The Demo button loads sample data so you can explore features immediately.