Validate with Python json.tool

bash

python -m json.tool input.json

Explanation

A built-in option that many systems already have.

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Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

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Strings and keys must use double quotes.

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Do not leave a comma after the last item.

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Bare identifiers are invalid in JSON.

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Use `\n` rather than an actual line break inside a string literal.

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