JSON Fromater, Validator & Minifier

Validate your JSON code

Format and beautify JSON

Compress JSON to save space

Clear the editor

Load sample JSON data

Upload JSON file from device

Download formatted JSON

Processing...

Enter JSON to validate

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Lines

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Size

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Depth

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Objects

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Arrays

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Quick Tips

Common Errors

• Missing quotes around keys
• Trailing commas
• Single quotes instead of double
• Unescaped characters

Keyboard Shortcuts

• Ctrl+Enter - Validate
• Ctrl+Shift+F - Format
• Ctrl+Shift+M - Minify
• Ctrl+Shift+C - Clear

Demo Data Available

Click the Demo button to load sample JSON data for testing the validator.

File Operations

Upload .json files or load JSON from URLs. Download your formatted results.

How to Use JSONLint Editor

Input JSON

Type, paste, upload files, or load from URLs

Validate

Check for syntax errors and JSON compliance

Format

Beautify and indent JSON for readability

Minify

Compress JSON to reduce file size

Export

Download processed JSON files

Analytics

View detailed statistics about your JSON

How Results Are Calculated

Validation Process

Our validator uses JavaScript's native JSON.parse() method with enhanced error detection. It identifies syntax errors, line numbers, and provides detailed error descriptions.

Statistics Calculation

• Characters: Total character count including whitespace
• Lines: Number of line breaks in the content
• Size: File size in bytes (UTF-8 encoding)
• Depth: Maximum nesting level of objects/arrays
• Objects: Count of JSON objects ({ })
• Arrays: Count of JSON arrays ([ ])

Error Highlighting

When validation fails, the editor highlights the problematic line with a red border and provides specific error details including the character position and nature of the error.

About JSONLint Editor

JSONLint is a validator and reformatter for JSON, a lightweight data-interchange format. Copy and paste, directly type, or input a URL in the editor above and let JSONLint tidy and validate your messy JSON code.

What Is JSON?

JSON (pronounced as Jason), stands for "JavaScript Object Notation," is a human-readable and compact solution to represent a complex data structure and facilitate data interchange between systems. It's a widespread data format with a diverse range of applications enabled by its simplicity and semblance to readable text.

Why Use JSON?

There are several reasons why you should consider using JSON:

• Language Independence: JSON is independent of your system's programming language
• Readability: Human-readable when properly formatted
• Compactness: Doesn't use complete markup structure like XML
• Easy Analysis: Simple to parse into logical components
• Universal Support: Libraries available for most programming languages

JSON Format Rules

• Data is in name/value pairs
• Data is separated by commas
• Objects are encapsulated within curly brackets { }
• Arrays are encapsulated within square brackets [ ]
• Strings must be in double quotes
• Boolean values: true or false (lowercase)
• Numbers: double-precision floating-point format
• Null values: null (lowercase)
• No trailing commas allowed
• File extension: .json
• MIME type: application/json

Why Use JSONLint?

Programming can be challenging, and finding errors in JSON code can be time-consuming. JSONLint helps you:

• Quickly identify and fix syntax errors
• Format JSON for better readability
• Minify JSON to reduce file size
• Validate JSON against standards
• Save time debugging JSON issues

Common JSON Errors

• Expecting 'STRING': Extra comma at end of object
• Expecting 'STRING', 'NUMBER', etc.: Extra comma at end of array
• Unquoted keys: Object keys must be in double quotes
• Single quotes: Use double quotes for strings
• Unescaped characters: Use backslash to escape special characters

This JSONLint Editor is built with modern web technologies and designed to be fast, reliable, and user-friendly. It processes everything locally in your browser for privacy and speed.