Question 1

What is JSON5?

Accepted Answer

JSON5 is a superset of JSON that aims to make it easier for humans to write and maintain by hand. It allows comments, trailing commas, unquoted object keys, single-quoted strings, multi-line strings, hexadecimal numbers, Infinity, NaN, and leading/trailing decimal points.

Question 2

How do I format JSON5 online?

Accepted Answer

Paste your JSON5 data into the input area and click Format. The tool will parse your JSON5 (including comments and trailing commas), then output clean, beautified JSON with proper indentation and syntax highlighting.

Question 3

Can this tool convert JSON5 to standard JSON?

Accepted Answer

Yes. The formatted output is always valid standard JSON — comments are stripped, trailing commas are removed, single-quoted strings are converted to double quotes, and special values like Infinity and NaN are converted to null. This makes it perfect for converting JSON5 config files to strict JSON.

Question 4

Is my JSON5 data sent to a server?

Accepted Answer

No. All parsing and formatting happens entirely in your browser using a custom JSON5 parser. No data is ever sent to any server.