JSON Formatter
Format, validate, and beautify JSON data — instantly.
How to Format JSON
Paste your raw JSON into the input area and click "Format / Validate". The tool parses the JSON, validates it, and displays it with proper indentation. Choose between 2 spaces, 4 spaces, or tab indentation. Use the Minify button to compress JSON into a single line for production use.
Why Format JSON?
Formatted JSON is easier to read, debug, and understand. APIs often return minified JSON that's hard to parse visually. This tool helps developers quickly inspect API responses, configuration files, and data structures. It also validates your JSON to catch syntax errors.
Is This Tool Free?
Yes, 100% free. JSON is parsed in your browser using native JavaScript — nothing is uploaded. Works offline too.
Frequently Asked Questions
Is this JSON formatter free?
Yes, 100% free. No sign-up, no limits. Format and validate as much JSON as you need.
Is my JSON data uploaded to a server?
No. All formatting and validation happens in your browser using native JSON.parse() and JSON.stringify(). Your data never leaves your device — safe for API keys, tokens, and sensitive configurations.
Can it fix JSON errors?
The tool highlights syntax errors and tells you what went wrong. Common errors like trailing commas, single quotes, and unquoted keys are clearly identified so you can fix them quickly.
What is the difference between format and minify?
Format (pretty-print) adds indentation and line breaks for readability. Minify removes all whitespace to produce the smallest possible output — ideal for production use.
Does it support large JSON files?
Yes, the tool handles large JSON documents efficiently since everything runs in your browser is native JavaScript engine.