Why Can't I Use Single Quotes in JSON Strings?

Single vs Double Quotes in JSON

In Python, the interchangeability of single and double quotes is a matter of convenience within Python syntax. However, when dealing with JSON, the rules for string representation are stricter.

JSON syntax demands double quotes for string values. Using single quotes, as in the first example:

s = "{'username':'dfdsfdsf'}"

will result in an error when trying to load the string into a JSON object. The correct syntax requires double quotes:

s = '{"username":"dfdsfdsf"}'

This distinction is crucial because JSON is a data format designed for interoperability between different languages and platforms. Using single quotes instead of double quotes violates the JSON specification and can lead to compatibility issues.

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