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Free online JSON and GET parameter converter. Quickly convert between URL query strings and JSON objects.
Choose how arrays are serialized in GET parameters: brackets, indexed, or repeated keys
Apply percent-encoding to values for safe transmission of special characters
Adds '?' at the beginning of the result, ready to be appended to an API endpoint
Enter content on the left to see real-time conversion results here
In front-end and back-end development or API debugging, you often need to convert between JSON objects and URL query strings (GET parameters). This tool quickly converts JSON objects into standard GET parameter strings, and parses GET parameter strings into formatted JSON objects. It eliminates the pain points of error-prone manual concatenation or parsing, boosting API integration efficiency.
key1=value1&key2=value2; GET to JSON outputs a formatted JSON object.Example: Inputting the JSON {"name":"John Doe","age":25} converts to the GET parameter name=John%20Doe&age=25; conversely, inputting name=John%20Doe&age=25 returns the JSON.
Please ensure your input JSON is valid, otherwise an error will be prompted. When converting GET parameters, key-value pairs are separated by "&" and connected by "=". This tool only handles string conversion and does not involve network requests. All data is processed locally in your browser and is never uploaded to a server, ensuring your privacy and security. For large amounts of data or batch conversions, we recommend processing in batches to prevent page lag.
In RESTful API design, query parameters often need to be passed in a structured way. Use this tool to quickly validate your GET parameter structures. For example, passing the filter condition filter[status]=active&filter[age][gte]=18 can be converted into the nested JSON {"filter":{"status":"active","age":{"gte":"18"}}}. Please note the differences in parameter parsing across various backend frameworks; this tool uses standard URLSearchParams parsing rules.

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