Why Format JSON?
Raw JSON from APIs is often minified and hard to read. Formatting makes it human-readable and easier to debug.
- API Debugging: Quickly inspect API responses to find errors or unexpected data.
- Data Validation: Verify that your JSON is syntactically correct before using it.
- Configuration Files: Clean up JSON config files for better readability in version control.
- Data Transfer: Minify JSON before sending to reduce payload size.
Common JSON Errors
- Missing commas: The most common error. JSON requires commas between key-value pairs.
- Trailing commas: Standard JSON does not allow trailing commas after the last item.
- Unquoted keys: All keys must be double-quoted in JSON.
- Single quotes: JSON requires double quotes for strings, not single quotes.
Step-by-Step: Format Your JSON
Step 1: Paste Your JSON
Paste your JSON data into the input textarea. It can be minified, poorly formatted, or from an API response.
Step 2: Click Format
The tool automatically validates and formats your JSON with proper indentation and syntax highlighting.
Step 3: Review Results
Check the status indicator (Valid/Invalid) and review the formatted output. Errors are highlighted with line numbers.
Step 4: Copy or Minify
Copy the formatted JSON or click Minify to compress it back into a single line.
Frequently Asked Questions
How does the JSON formatter work?
Paste your JSON data and click Format. The tool parses, validates, and displays your JSON with syntax highlighting and proper indentation.
Is my JSON data uploaded to a server?
No. All processing happens in your browser. Your JSON data never leaves your device.
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Format Your JSON Now
Paste messy JSON and get perfectly formatted, validated output instantly.
No sign-up • No server uploads • 100% browser-based