How to Format JSON Online: A Simple Guide

JSON is easy for computers to exchange but difficult for people to read when it is compressed onto one line. Formatting adds indentation and line breaks without changing the underlying data.

How to format JSON

1. Copy your JSON response, configuration, or payload.
2. Open Casetivo's JSON Formatter.
3. Paste the JSON and format it.
4. Review the indentation, validate the structure, then copy the result.

For example, {"name":"Ana","active":true} becomes a readable object with one property per line.

Common JSON errors

Valid JSON uses double quotes around property names and string values. It does not allow trailing commas, comments, or single-quoted strings. If formatting fails, check the location of missing commas, brackets, braces, and quotes.

JSON formatting vs. minifying

Formatting makes JSON readable. Minifying removes unnecessary whitespace to reduce file size. Use formatted JSON while debugging and minified JSON when size matters in a production transfer.

FAQ

Does a formatter change my JSON values?

No. It changes whitespace and indentation only. Validation may identify invalid syntax, but it does not alter your data.

Can I convert formatted JSON to YAML?

Yes. After validation, use the JSON to YAML Converter when you need YAML output.