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About JSON Formatter

The JSON Formatter at Online Tool Base is a definitive utility for developers handling JavaScript Object Notation. It transforms minified, unreadable JSON strings into a beautifully indented, human-readable structure.

Why Use This Tool?

JSON is the language of the web, but APIs often send it in a compact format to save bandwidth. Debugging a 5MB single-line string is impossible. **onlinetoolbase.online** solves this by parsing and formatting code instantly, making structure validation a breeze.

Key Features

  • Syntax Highlighting: Color-coded keys and values for easy reading.
  • Error Detection: Instantly spots missing commas or unclosed braces.
  • Collapsible Trees: Navigate deeply nested objects with ease.

How to Use

  1. Paste your raw JSON string.
  2. Click Format.
  3. Copy the beautified code.

Security Note

Your data never leaves your browser. All formatting happens locally via JavaScript.