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Turns your data into a form URL encoded string, the key=value&key=value format that web forms and many APIs expect in a request body. Each field becomes a name=value pair, the pairs are joined with &, and any characters that are not safe in a URL are encoded. The only choice is how spaces are written, which differs between two web standards.

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Fields

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Sample data

FieldValue
Encoding typeRFC 1738 Spaces to +
Input: 
{ "first_name": "Jane Doe", "city": "Den Bosch", "tags": ["new", "vip"] }
Output: 
"first_name=Jane+Doe&city=Den+Bosch&tags%5B0%5D=new&tags%5B1%5D=vip"
Spaces became +, and the nested list tags was flattened into tags[0] and tags[1] (with the brackets encoded as %5B and %5D).