What Is JSON?
JSON stands for JavaScript Object Notation.
It is a lightweight text format commonly used to exchange structured data between applications, APIs, and services.
For example, an API may return information about users, products, weather, or other resources as JSON.
Why Format JSON?
JSON is sometimes returned as one long line.
That may be valid JSON, but it can be difficult for humans to read.
Formatting adds indentation and line breaks, making the structure easier to understand.
Formatted JSON is useful for:
- Debugging APIs
- Checking configuration files
- Understanding nested objects
- Finding missing brackets
- Sharing data with developers
How to Format JSON
- Open our [JSON Formatter](/tools/json-formatter).
- Paste your JSON.
- Click the format or beautify option.
- Review the formatted result.
- Fix any syntax errors reported by the tool.
Common JSON Errors
Single Quotes
JSON strings normally require double quotes.
Incorrect:
{'name': 'John'}
Correct:
{"name": "John"}
Trailing Commas
JSON does not allow a comma after the final property or array item.
Unquoted Keys
Object keys should normally be enclosed in double quotes.
Missing Brackets
Every opening object or array must have a matching closing character.
JSON vs JavaScript
JSON looks similar to JavaScript objects, but it follows stricter syntax rules.
JavaScript can support things that JSON does not, such as comments and certain unquoted object keys.
This is why JavaScript object syntax cannot always be copied directly into a JSON file.
Formatting vs Minifying
Formatting makes JSON easier for humans to read.
Minifying removes unnecessary whitespace to make the text smaller.
Formatted:
{"name": "John", "age": 20}
Minified JSON removes unnecessary spaces and line breaks.
Developers often format JSON while debugging and minify it when compact data is needed.
Conclusion
A JSON formatter can save time when working with APIs, configuration files, and structured data.
Try our free JSON Formatter to format and validate JSON in your browser.