JSON5

Purpose

To relax JSON syntax restrictions so configuration files are easier to write and maintain by hand.

Mechanism

On top of JSON it allows: unquoted keys, single-quoted strings, trailing commas, comments, hexadecimal numbers, NaN/Infinity/-0, and multiline strings. It parses into standard JSON values.

Use cases

• JavaScript configuration files
• Hand-edited configuration
• Prototype data
• An alternative to JSON configuration

Examples

• Input

  {name:'Ada',age:36,}

  Output

  The object {name:"Ada", age:36}

  Single quotes plus a trailing comma

Common errors

Parsing JSON5 as standard JSON fails

Use a dedicated JSON5 parser