Paste your JSON below to format, minify, or validate it. All processing happens in your browser.
Input
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 the most widely used format for web APIs, configuration files, and data storage. JSON supports strings, numbers, booleans, null values, arrays, and objects.
Paste your JSON data into the input area above and choose an action:
| Error | Cause | Fix |
|---|---|---|
| Unexpected token | Invalid character in the JSON data | Check for typos, missing quotes, or extra commas |
| Unexpected end | JSON is incomplete or truncated | Ensure all brackets and braces are closed |
| Trailing comma | Comma after the last item in an array or object | Remove the trailing comma before the closing bracket |
| Single quotes | JSON requires double quotes for strings | Replace single quotes with double quotes |
JSON (JavaScript Object Notation) is a lightweight data interchange format. It is easy for humans to read and write, and easy for machines to parse and generate. JSON is used extensively in web APIs, configuration files, and data storage.
Paste your JSON into the input area above and click the Format button. You can choose between 2-space, 4-space, or tab indentation. The formatted output will appear below with syntax highlighting.
Yes, completely free with no signup required. All processing happens entirely in your browser. No data is sent to any server.
Minification removes all unnecessary whitespace, line breaks, and indentation from your JSON, producing the smallest possible output. This is useful for reducing payload size in APIs and storage.
The validator parses your JSON and checks for syntax errors. If an error is found, it reports the exact line and column where the problem occurs so you can quickly locate and fix the issue.