JSON Formatter
Format, minify, and validate JSON with tree view and JSON Path evaluation. Syntax error highlighting with line numbers.
Paste JSON and click Format JSON to prettify or minify.
About This Tool
JSON (JavaScript Object Notation) is the universal data format for web APIs, configuration files, and data exchange. This tool helps you format, validate, and minify JSON data instantly, all within your browser — no data is ever sent to a server.
Format (Beautify): Takes compact or messy JSON and formats it with proper indentation and line breaks, making it easy to read and debug. Choose 2-space, 4-space, or tab indentation. Perfect for inspecting API responses or config files.
Minify (Compact): Removes all unnecessary whitespace to create the smallest possible JSON string. Useful for reducing payload size in API requests or when you need to embed JSON in a URL or HTML attribute.
Validation with Error Location: If your JSON has syntax errors, the tool shows the exact error message along with the line number where the problem was detected. Common errors include missing commas, trailing commas, unquoted keys, and mismatched brackets.
Stats: After processing, see the original and formatted character counts to understand the size difference between formats.