JSON Formatter
Format, validate, and auto-fix JSON data with advanced error correction
JSON Input
Paste your JSON data here to format and validate
Formatted JSON
Beautified JSON with proper indentation
No Formatted JSON
Enter valid JSON and click "Format" to see the beautified output
The Ultimate Guide to JSON Formatting
Everything you need to know about JSON, from syntax to best practices
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language, Standard ECMA-262 3rd Edition - December 1999. JSON is a text format that is completely language independent but uses conventions that are familiar to programmers of the C-family of languages, including C, C++, C#, Java, JavaScript, Perl, Python, and many others. These properties make JSON an ideal data-interchange language.
Why Use a JSON Formatter?
A JSON formatter, also known as a beautifier or pretty-printer, is a tool that adds indentation and line breaks to raw JSON data, making it readable and easier to understand. This is crucial for developers and data analysts for several reasons:
- Readability: Formatted JSON is structured visually, allowing you to easily see the hierarchy and nesting of data.
- Debugging: It's much easier to spot syntax errors, missing commas, or mismatched brackets in a formatted structure.
- Validation: Most formatters also validate the JSON, ensuring it adheres to the correct syntax before you use it in an application.
- Minification: A good tool can also minify JSON, removing all whitespace to reduce file size for efficient data transfer.
Common JSON Errors and How to Fix Them
Our tool can automatically fix many common JSON errors. Here are some you might encounter:
Trailing Commas
Error: { "key": "value", }
Fix: Remove the comma after the last element in an object or array.
Missing Quotes on Keys
Error: { key: "value" }
Fix: All property keys must be enclosed in double quotes.
Single Quotes
Error: { 'key': 'value' }
Fix: JSON requires double quotes for both keys and string values.
Mismatched Brackets
Error: { "data": [1, 2, 3 }
Fix: Ensure every opening brace { or bracket [ has a corresponding closing one.
Security and Privacy
We prioritize your data's security. All JSON processing is done entirely on your device in the browser. Your data is never sent to our servers, ensuring complete privacy and security.