JSON Formatter

JSON Formatter takes JSON in any shape, checks that it is valid and prints it back with consistent indentation so you can read it. API responses and config files often arrive as one unbroken line; formatting them is the fastest way to see the structure and find the field you are looking for.

When JSON will not parse, the tool reports the problem in plain language along with the line and column where the parser gave up. Most invalid JSON comes down to a handful of mistakes: a trailing comma after the last item, single quotes instead of double quotes around keys, an unescaped quote inside a string, or a missing closing bracket. The error message points you at the spot rather than making you hunt.

Parsing uses the browser's built-in JSON parser. The tool never evaluates your input as code, so pasting JSON from an untrusted source is safe, and nothing is transmitted to a server.

• Validate and pretty-print in one step
• Choose two spaces, four spaces or tab indentation
• Error messages that name the line and column
• Minify back to a single line
• Sort object keys alphabetically
• Reports node count and nesting depth
• Copy and download the result
• Uses the native JSON parser, never eval

The json formatter is used by writers, developers, students, marketers and anyone else who needs the job done once without installing software. Common cases include:

• Reading an API response that arrived as one long line
• Checking that a config file is valid before deploying it
• Finding the syntax error in JSON that a build tool rejected
• Comparing two structures by formatting both the same way
• Preparing readable JSON for documentation or a bug report