JSON Formatter
Format, minify, and explore JSON with syntax-aware live transforms.
Free & unlimited
View
Indent
Keys
Input
Result
{
"name": "toolchamp",
"version": 1,
"tags": [
"json",
"formatter"
],
"active": true
}
All processing happens in your browser. No data is sent to any server.
About this tool
- 1
Paste JSON
Enter or paste your JSON data in the input area.
- 2
Format or minify
Click Format for pretty-printed output, or Minify for compact output.
- 3
Check for errors
Invalid JSON shows error messages with line numbers.
- 4
Copy or download
Copy the formatted JSON or download as a .json file.
- The formatter shows exact error positions when JSON is invalid.
- Use 2-space indent for compact output, 4-space for maximum readability.
- Minified JSON is great for API payloads and configuration files.
- You can paste raw API responses to quickly inspect their structure.
- Pretty-print
- Minify
- Error detection
- Line numbers
- Copy to clipboard
- Download
- Indent options
- Format API responses for debugging.
- Validate JSON before sending to an API.
- Minify JSON for production configuration files.
- Inspect complex nested JSON structures.
All syntax errors including missing commas, unquoted keys, trailing commas, and mismatched brackets. Error messages include the line and column number.
The tool handles JSON files up to several megabytes. Very large files may take a moment to format.