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Developer Tools
Developer Tools
JSON Formatter Features
JSON Formatter · JSON Beautifier · JSON Pretty Print — format compressed or unformatted JSON with clean 2-space indentation. Provides detailed error messages when invalid JSON is entered. Copy the formatted result instantly. Free online JSON formatter.
How to Use
① Paste your JSON text into the input field. ② Click 'Format'. ③ The formatted JSON with proper indentation appears below. ④ Click 'Copy' to save the result to your clipboard.
When to Use
• Inspecting API response JSON to understand its structure • Cleaning up config or package.json files • Making compressed JSON logs readable • Finding and debugging JSON syntax errors
Frequently Asked Questions
- Q. Does it validate JSON too?
- A. Yes. JSON is automatically validated during parsing. If there is an error, a detailed message with the location is shown.
- Q. Can it handle arrays and nested objects?
- A. Yes, it handles all JSON types including arrays, nested objects, null, booleans, and numbers.
- Q. Can it process large JSON?
- A. Yes, within your browser's memory limits. Files of several dozen megabytes can typically be processed without issues.
- Q. Does JSON Pretty Print increase the file size?
- A. Yes. Indentation and line breaks increase the file size. Use minified JSON for server deployment and API responses, and use Pretty Print only for readability and debugging.
- Q. Can deeply nested JSON (5+ levels) be formatted?
- A. Yes. Any depth of nesting is formatted consistently. Very large JSON files may take longer depending on your browser's performance.