JSON Formatter
Paste minified or messy JSON and get it back instantly formatted with proper indentation, easy to read and debug.
About this json formatter
API responses and config files often arrive as a single dense line of JSON. This tool reformats it with consistent indentation, making structure and errors immediately visible.
How json formatter works
Your JSON is parsed and re-serialized with 2-space indentation. If the JSON is invalid, parsing will fail and point you toward the structural problem.
Common uses
- Making a minified API response readable for debugging
- Formatting a config file before editing it
- Visually inspecting nested JSON structure
How to use this tool
- Paste your JSON.
- Click Process.
- Copy the formatted, indented result.
What to know before using it
Requires syntactically valid JSON to format successfully, for a dedicated error-location tool on broken JSON, see the JSON Validator.
Privacy and browser-first processing
Your JSON is processed entirely in your browser and is never uploaded or stored, safe to use even with sensitive API payloads.
Frequently asked questions
What happens if my JSON is invalid?
Formatting will fail since valid structure is required to parse it, double-check for missing commas, quotes, or brackets.
Is this safe for sensitive data?
Yes, everything runs locally in your browser, your JSON is never sent to a server.