JSON Formatter & Validator
Format, validate, and beautify JSON data online. Minify JSON, fix errors, and view with syntax highlighting. Free and instant.
How to Use the JSON Formatter
Paste your JSON into the input box, then click "Beautify" to format it with proper indentation, "Minify" to compress it to a single line, or "Validate" to check if it's valid JSON. Choose your preferred indentation (2 spaces, 4 spaces, or tabs).
What Is JSON?
JSON (JavaScript Object Notation) is a lightweight data format used for exchanging data between servers and web applications. It's human-readable and widely used in APIs, configuration files, and databases. Valid JSON requires proper use of double quotes, commas, brackets, and braces.
Common JSON Errors
The most frequent JSON errors include missing commas between elements, using single quotes instead of double quotes, trailing commas after the last element, and unescaped special characters in strings. This validator will show you exactly where the error occurs so you can fix it quickly.