JSON Formatter
Format, validate and minify JSON data. Instantly pretty-print or compress JSON with syntax highlighting.
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How to Use JSON Formatter
JSON (JavaScript Object Notation) is the most widely used data interchange format in modern web development, APIs, and configuration files. Reading minified or poorly formatted JSON can be challenging without proper indentation. Our JSON Formatter instantly beautifies compact JSON into human-readable, indented format, making it easy to inspect, debug, and understand. It also validates JSON and reports syntax errors with specific details when your JSON is malformed. Additionally, it can minify JSON by removing all whitespace, which is useful for reducing payload sizes in API requests and responses. Choose between 2-space or 4-space indentation based on your preference.
- 1
Paste your JSON
Copy and paste your JSON data into the left input panel.
- 2
Click Format or Minify
Click 'Format' to beautify with indentation, or 'Minify' to compress. 'Validate' checks syntax without transforming.
- 3
Copy the result
The formatted or minified JSON appears in the right panel. Click Copy to use it.
Frequently Asked Questions
What happens when my JSON has errors?
The validator reports the exact error message from the JSON parser, including details that help you locate the syntax mistake.
Does it support large JSON files?
Yes. Since processing is done in the browser with JavaScript's native JSON parser, it can handle large payloads efficiently.
Can I format JSON with comments (JSONC)?
Standard JSON does not allow comments. If your JSON contains comments, they must be removed before formatting.