JSON Formatter & Validator
Format, validate, and beautify JSON with tree view, path copying, and instant error detection
Input JSON
Output
Formatted JSON will appear here...Instant Validation
Real-time JSON syntax checking
Tree View
Collapsible hierarchical view
Path Copy
Click to copy JSON paths
Format Options
2/4 spaces or tabs
What is JSON?
JSON (JavaScript Object Notation) is a lightweight, text-based data interchange format that's easy for humans to read and write, and easy for machines to parse and generate. It's the most popular format for API responses, configuration files, and data storage in modern web development.
Powerful Features
Pretty Print
Format JSON with proper indentation for easy reading
Validation
Detect syntax errors with precise line numbers
Tree View
Navigate complex JSON structures visually
Syntax Highlighting
Color-coded keys, values, strings, and numbers
Minify
Compress JSON by removing whitespace
One-Click Copy
Copy formatted JSON to clipboard instantly
Common JSON Errors & How to Fix Them
❌ Trailing comma
💡 Remove the comma after the last element
❌ Single quotes
💡 JSON requires double quotes for strings
❌ Unquoted keys
💡 All keys must be quoted in JSON
❌ Missing comma
💡 Add commas between elements
Frequently Asked Questions
What is JSON used for?
JSON is used for API responses, configuration files, data storage, and exchanging data between servers and web applications. It's the standard format for RESTful APIs.
How do I validate JSON?
Paste your JSON into our tool - it automatically validates and highlights any syntax errors with precise line numbers and error descriptions.
What's the difference between JSON and JavaScript objects?
JSON is a text format that's stricter than JavaScript objects. JSON requires double quotes for keys and strings, doesn't support trailing commas, and can't include functions or undefined values.
Is my data secure?
Absolutely! All processing happens in your browser. Your JSON data never leaves your device - we don't upload or store anything on our servers.