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The JSON formatter is a comprehensive toolbox that helps you work with JSON data. It provides multiple tools in one interface for formatting, validating, comparing, querying, converting, and validating JSON against schemas.

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Features

The JSON toolbox includes six specialized tools:

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Formatter

Format and validate JSON with multiple output options:
  • Validate - Check if JSON is valid and properly structured
  • Pretty print - Format with indentation for readability
  • Minify - Remove all whitespace to reduce size
  • Sort keys - Alphabetically order object keys
  • Escape/unescape - Convert to/from escaped strings
  • Base64 encode/decode - Convert JSON to/from Base64
The formatter automatically detects and reports syntax errors with helpful error messages.

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Tree view

Visualize JSON structure in an interactive tree format:
  • Expand and collapse nested objects and arrays
  • Navigate complex data structures easily
  • View the hierarchy at a glance
  • Useful for exploring deeply nested JSON

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Diff

Compare two JSON documents side-by-side:
  • Highlight differences between JSON files
  • Identify added, removed, and modified values
  • Compare API responses or configuration files
  • Visual diff highlighting

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Path query

Extract data using JSONPath expressions:
  • Query JSON using JSONPath syntax
  • Extract specific values from nested structures
  • Filter and transform data
  • Test JSONPath expressions interactively
Use JSONPath to extract specific fields from large API responses without manual parsing.

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Convert

Transform JSON to other formats:
  • Convert to YAML, XML, CSV, or other formats
  • Export data in different structures
  • Transform between data formats
  • Useful for data migration and integration

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Schema validation

Validate JSON against JSON Schema:
  • Define data structure requirements
  • Validate API responses
  • Ensure data conforms to expected format
  • Get detailed validation errors

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Use cases

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API development

Test and debug API responses: 
{
  "user": {
    "id": 123,
    "name": "John Doe",
    "email": "[email protected]"
  },
  "posts": [
    {"id": 1, "title": "Hello World"},
    {"id": 2, "title": "JSON Tips"}
  ]
}

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Configuration files

Validate and format configuration files before deployment.

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Data transformation

Convert between JSON and other formats like YAML or XML.

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Testing

Compare expected vs actual API responses using the diff tool.

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Loading data

You can load JSON data in multiple ways:
  • Type or paste - Enter JSON directly into the editor
  • Load file - Upload JSON files from your computer
  • Examples - Choose from preset examples to explore features
The toolbox accepts .json, .txt, .geojson, and .jsonl file formats.

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Keyboard shortcuts

The JSON toolbox supports keyboard shortcuts for common actions. The available shortcuts vary by tab:
  • Cmd/Ctrl + Enter - Execute the current action (format, validate, etc.)
  • Cmd/Ctrl + K - Clear all inputs
  • Cmd/Ctrl + C - Copy output to clipboard

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Examples

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Simple object

{"name":"John Doe","age":30,"city":"New York","active":true}

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Array of objects

[{"id":1,"product":"Laptop","price":999.99},{"id":2,"product":"Mouse","price":29.99}]

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Nested structure

{"user":{"profile":{"name":"Jane","settings":{"theme":"dark","notifications":true}},"posts":[{"title":"Hello World","tags":["intro","welcome"]}]}}

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Tips

Use the tree view to explore unfamiliar JSON structures before writing code to parse them.
The minify feature is useful when you need to include JSON in URLs or reduce payload size.
Load example data to quickly test each tool’s capabilities without preparing your own data.

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