Can a JSON value contain a multiline string

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Per the specification, the JSON grammar’s char production can take the following values:

  • any-Unicode-character-except-"-or-\-or-control-character
  • \"
  • \\
  • \/
  • \b
  • \f
  • \n
  • \r
  • \t
  • \u four-hex-digits

Newlines are “control characters”, so no, you may not have a literal newline within your string. However, you may encode it using whatever combination of \n and \r you require.

The JSONLint tool confirms that your JSON is invalid.

And, if you want to write newlines inside your JSON syntax without actually including newlines in the data, then you’re doubly out of luck. While JSON is intended to be human-friendly to a degree, it is still data and you’re trying to apply arbitrary formatting to that data. That is absolutely not what JSON is about.

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