JSON Formatter & Validator Calculator

A JSON formatter takes raw, unreadable or minified JSON data and 'prettifies' it by adding appropriate indentation, line breaks, and spacing, making it easy for humans to read and debug.

Simply paste your JSON into our tool. If it is valid, the status bar will show a green 'Valid JSON'. If there are syntax errors, it will highlight the exact line and column where the error occurred.

Common causes of invalid JSON include missing quotation marks around keys, using single quotes (') instead of double quotes (\\\\"), missing commas between properties, and trailing commas at the end of objects or arrays.

Click the 'Minify' button in our tool. Minification strips all unnecessary whitespace, tabs, and newlines from the JSON string to reduce its file size, which is ideal for API responses and network transfers.

JSON (JavaScript Object Notation) is lightweight, text-based, language-independent, and easy for both humans to read/write and machines to parse/generate, making it the standard for REST APIs.

No. The official JSON specification does not support comments (like // or /* */). If you have comments in your JSON, standard parsers like JSON.parse() will throw a syntax error.

JSON supports Strings, Numbers, Booleans (true/false), Arrays, Objects, and null. It does not natively support undefined, Functions, or Date objects.

In JavaScript, you can convert a valid JSON string into a native JavaScript object by passing it to the built-in function \\\`JSON.parse(jsonString)\\\`.

No. While JSON is derived from JavaScript object syntax, JSON requires double quotes around all keys, whereas JavaScript allows unquoted or single-quoted keys. Furthermore, JSON cannot contain functions.

This usually means there is a typo. Check the line number provided by our validator. Look for missing quotes, trailing commas, or missing brackets near that exact position.