JSON Formatter
Validate, format and minify JSON instantly. Syntax highlighted output with error detection.
Output will appear here… How to Use JSON Formatter
To format JSON, paste your raw or minified JSON string into the input area. The tool parses it and displays a prettily indented, human-readable version with proper spacing and line breaks. Syntax errors are highlighted immediately so you can identify and fix malformed JSON.
You can also minify JSON by clicking the Minify button, which removes all unnecessary whitespace to produce the most compact representation. The stats panel shows the formatted and minified sizes side by side. Use the Copy button to copy either version to your clipboard.
Frequently Asked Questions
What does JSON formatting do? expand_more
JSON formatting (also called prettifying) adds consistent indentation, line breaks, and spacing to JSON data, making it easy to read and understand the structure of nested objects and arrays.
What is JSON minification? expand_more
JSON minification removes all whitespace, line breaks, and indentation that are not part of the data values, producing the smallest possible JSON string. This reduces file size for storage or network transmission.
What happens if my JSON is invalid? expand_more
If the input is not valid JSON, the tool displays a parse error message indicating where the problem was detected. Common issues include missing commas, unquoted keys, and trailing commas.
Can I use this to validate JSON? expand_more
Yes. If your JSON parses without errors and displays correctly, it is syntactically valid. The tool effectively acts as a JSON validator in addition to a formatter.
What indentation size does the formatter use? expand_more
The formatter uses 2-space indentation by default, which is the most common convention for JSON. Some tools offer configurable indentation, typically 2 or 4 spaces.
Related Tools
All Developer Toolsarrow_forwardBase64 Encode / Decode
Encode strings or files to Base64 or decode Base64 back to text.
URL Encode / Decode
Percent-encode URLs or decode percent-encoded strings.
HTML Encode / Decode
Escape HTML entities or unescape them back to characters.
Regex Tester
Test regular expressions live with match highlighting and capture groups.