JSON Formatter
Paste minified or messy JSON to instantly beautify it, or check for syntax errors.
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Why format JSON?
APIs and log files often return JSON as a single unbroken line to save space, which makes it nearly impossible to read by eye. Formatting (also called "beautifying" or "pretty-printing") re-indents the JSON so each field sits on its own line, making the structure obvious at a glance. This tool also validates the JSON as it formats — if there's a syntax error, you'll see exactly what's wrong instead of a blank result.
Frequently asked questions
- What happens if my JSON is invalid?
- The tool shows the parser's error message so you can find and fix the issue, instead of silently failing.
- What's the difference between beautify and minify?
- Beautify adds indentation and line breaks for readability. Minify strips all unnecessary whitespace to produce the smallest possible output, which is useful for reducing payload size in production.
- Does this support JSON5 or JSONC (comments)?
- No, this follows the standard JSON spec (RFC 8259), which doesn't allow comments or trailing commas.