JSON Formatter

JavaScript Object Notation: a text format for structured data — objects in curly braces, arrays in square brackets, with string keys and values that are strings, numbers, booleans, null, arrays, or objects.

The usual culprits are trailing commas, single quotes instead of double quotes, unquoted keys, comments, or a missing closing brace. The validator reports the exact line and column where parsing stopped.

The precise position in your input where the parser first hit something invalid. Look just before that spot — the real mistake (like a missing comma) is usually right there.

Format pretty-prints JSON with indentation and line breaks so humans can read it. Minify strips all unnecessary whitespace into one compact line for smaller payloads and faster transfers.

No. Validation and formatting run entirely in your browser; nothing you paste leaves the page or is stored.