How do I format or validate JSON?

Paste your JSON in the left panel. It is automatically pretty-printed with 2-space indentation. Use the 'Minify' toggle to compress it, or 'Try to Fix' to auto-repair common syntax errors.

What is JSON formatting?

JSON formatting (pretty-printing) adds consistent indentation and line breaks to JSON data, making it easier to read and debug. Minification removes whitespace to reduce file size for production use.

Is the JSON formatter free?

Yes, completely free. Formatting and validation run entirely in your browser — no data is sent to any server, and no signup is required.

JSON Formatter & Validator

Format and validate JSON instantly online. Free JSON pretty-printer with syntax error detection and 2-space indentation. No signup required.

JSON Input

Formatted JSON

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How to Use the JSON Formatter

Paste your raw or minified JSON in the left panel.
The formatted output with 2-space indentation appears on the right.
Syntax errors are shown instantly with a descriptive message.
Click "Copy Output" to copy the formatted JSON.
Use "Download" to save the result as a .json file.

Features

Validates JSON and reports parse errors with exact location.
Formats any valid JSON: objects, arrays, strings, numbers, booleans, null.
Normalizes inconsistent whitespace and quoting.
Handles deeply nested structures without size limits.