CoderTools

JSON Formatter

Format and validate your JSON data to make it easier to read and debug. Supports minify, beautify, and syntax highlighting.

How to Use JSON Formatter

Steps to Use

  1. Paste your JSON data in the input box on the left.
  2. Click the "Format" button to format JSON data into a readable form.
  3. Click the "Minify" button to compress JSON data into a single line.
  4. Click the "Auto Fix" button to automatically fix common JSON syntax errors.
  5. Click the "Copy" button to copy the result to clipboard.
  6. Click the "Clear" button to clear both input and output areas.
  7. Use the "Escape Output" toggle to escape output for embedding in program code.
  8. Use the "Dark Mode" toggle to switch the display theme.

Escape Output Example

When escape output is enabled, JSON strings are escaped for direct embedding in program code. For example:

Normal Output::

{ "message": "Hello \"World\"", "newline": "Line 1\nLine 2" }

Escaped Output::

{\n \"message\": \"Hello \\\"World\\\"\",\n \"newline\": \"Line 1\\nLine 2\"\n}

Features

  • Auto Format: Beautify your JSON data with proper indentation and line breaks.
  • Syntax Validation: Check for syntax errors in your JSON data and provide error messages.
  • Syntax Highlighting: Mark JSON key-value pairs and data types with different colors.
  • Minify Function: Convert formatted JSON into a compact single-line form to reduce data size.
  • Auto Fix: Automatically fix common JSON syntax errors like unquoted keys and trailing commas.
  • Escape Output: Escape JSON strings for direct embedding in program code.
  • Local Processing: All data processing is done in your browser, nothing is uploaded to servers.
  • Real-time Processing: Input changes are automatically processed and results are updated.

Operation Details

Format

Beautifies JSON with 2-space indentation and line breaks, preserving key order.

Input:
{"name":"John","age":30}
Output:
{
  "name": "John",
  "age": 30
}

Minify

Removes all unnecessary whitespace and line breaks to create a compact single-line format.

Input:
{
  "name": "John",
  "age": 30
}
Output:
{"name":"John","age":30}

Auto-Fix

Automatically fixes common JSON syntax errors:

  • Adds double quotes around unquoted property names
  • Replaces single quotes with double quotes
  • Removes trailing commas before closing brackets
Input:
{name:'John',age:30,}
Output:
{"name":"John","age":30}

Related Tools

JSON Processing Toolkit

JSON toolkit with compare, schema validation, JSONPath query, key sorting, flatten/unflatten

JSON YAML Converter

Convert between JSON and YAML formats with custom indentation and flow/block style support

JSON CSV Converter

Convert between JSON and CSV formats with nested object flattening and custom delimiter support

XML Formatter

Format and validate XML data with syntax highlighting

YAML Formatter

Format, validate YAML data and convert to JSON with syntax highlighting and multiple format options

Text Diff Checker

Compare differences between two texts or files with side-by-side highlighted view

Quick Menu

No recent tools