📋 JSON Formatter
Format, validate, and beautify JSON data
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How JSON Formatting Works
- 1Paste your JSON string into the input area.
- 2The formatter parses the JSON to check for syntax errors.
- 3Valid JSON is reformatted with proper indentation and line breaks.
- 4Choose between pretty-print (readable) or minified (compact) output.
- 5Syntax errors are highlighted with the line number and description.
About JSON Formatter
Format, validate, and beautify JSON data online. Minify or pretty-print JSON with customizable indentation. Detect syntax errors with helpful error messages. Free JSON tool.
Frequently Asked Questions
What is valid JSON?
Valid JSON uses double quotes for keys and strings, supports objects {}, arrays [], strings, numbers, booleans (true/false), and null. No trailing commas, no single quotes, no comments.
What does minify mean?
Minification removes all whitespace, newlines, and indentation to make JSON as compact as possible. This reduces file size for network transfer while keeping the data identical.
Is my data safe?
Yes. All formatting happens in your browser using JavaScript. No data is sent to any server. Your JSON never leaves your device.