JSON Viewer, Validator & Formatter

An all-in-one, powerful tool for working with JSON data. This utility provides instant validation, pretty-printing (beautifying), minification, and an interactive tree view for any valid JSON. With a live-updating editor, synchronized line numbers, and intelligent error highlighting, it's the perfect companion for developers, QA testers, and anyone working with JSON APIs.

How It Works

Our JSON tool is designed as a complete Integrated Development Environment (IDE) in your browser. The interface is split into two resizable panels for a seamless workflow.

  1. Enter Your JSON: Paste or type your JSON data into the input editor on the left. The tool validates it in real-time.
  2. View Formatted Output: The right panel instantly displays the beautified or minified version of your data, complete with syntax highlighting.
  3. Explore the Tree View: Switch to the "Tree View" tab to navigate your JSON structure in a collapsible, interactive tree.

Key Features

  • Real-Time JSON Validation:
    • As you type, the tool instantly checks if your JSON is well-formed.
    • The status bar provides clear "Valid JSON" or specific error messages (e.g., `Unexpected token "}"`).
    • Smart Error Highlighting: When an error is detected, the corresponding line number is automatically highlighted, making it incredibly easy to find and fix syntax issues.
  • Advanced Editor with Line Numbers:
    • The input editor features synchronized, scrolling line numbers, just like a professional code editor.
    • A resizable divider allows you to adjust the size of the input and output panels to your liking.
  • Dual Output Modes:
    • Beautify/Pretty-Print: Formats your JSON with proper indentation for maximum readability. You can choose between 2 spaces, 4 spaces, or tabs for indentation.
    • Minify: Compresses your JSON into a single, compact line by removing all unnecessary whitespace.
  • Interactive Tree Viewer:
    • Switch to the "Tree View" tab to see your data represented as a collapsible, hierarchical tree.
    • Easily expand and collapse nested objects and arrays to explore the data structure.
    • Displays array lengths and data types (string, number, boolean, null) for quick reference.
  • Full Syntax Highlighting: Both the input and output views feature rich syntax highlighting, color-coding keys, strings, numbers, booleans, and null values for enhanced clarity.
  • Convenient Utilities: Includes one-click buttons to Copy the formatted output, Clear the editor, or Load sample JSON to get started.

How to Use the Tool

  1. Step 1: Input Your JSON
    Paste your data into the left-hand editor. The status bar at the bottom will immediately confirm if it's valid.
  2. Step 2: Choose Your Output
    Click "Beautify" or "Minify" to format the JSON in the right-hand panel. Use the indent controls to change the formatting style.
  3. Step 3: Explore the Tree
    Click the "Tree View" tab in the output panel to navigate your data's structure interactively.
  4. Step 4: Copy Your Result
    Click the "Copy" button to grab the currently displayed formatted (beautified or minified) JSON.

Find Our Tool

JSON Viewer, JSON Validator, JSON Formatter, JSON Beautifier, JSON Minifier, JSON Tree Viewer, Online JSON Editor, JSON Lint, JSON Syntax Highlighter, JSON Parser.