How to serialize an object into a list of URL query parameters using JavaScript ? Last Updated : 20 Jun, 2023 Comments Improve Suggest changes Like Article Like Report Given a JavaScript Object and the task is to serialize it into a URL query parameters using JavaScript. Approach 1: Declare an object and store it in the variable.Then use JSON.stringify() method to convert a JavaScript object into strings and display the content.Next, take an empty string and append (key, value) pairs of objects to it by accessing every property of the object. Example: This example serializes an object into a list of URL query parameters using JavaScript. JavaScript // Declare an object let obj = { p1: 'GFG', p2: 'Geeks', p3: 'GeeksForGeeks' } // Use JSON.stringify() function to // convert object into string console.log(JSON.stringify(obj)); // Function to Serialize an Object into a // list of URL query parameters function GFG_Fun() { let s = ""; for (let key in obj) { if (s != "") { s += "&"; } s += (key + "=" + encodeURIComponent(obj[key])); } console.log("'" + s + "'"); } GFG_Fun(); Output{"p1":"GFG","p2":"Geeks","p3":"GeeksForGeeks"} 'p1=GFG&p2=Geeks&p3=GeeksForGeeks' Approach 2: Declare an object and store it in the variable.Then use JSON.stringify() method to convert a JavaScript object into string and display the content.Use map() method to append the object key-value pair and use join() method to join all object elements. Example: This example uses the map() method and appends each key, and value pair to a string. JavaScript // Declare an object let obj = { p1: 'GFG', p2: 'Geeks', p3: 'GeeksForGeeks' } // Use JSON.stringify() function to // convert object into string console.log(JSON.stringify(obj)); // Function to Serialize an Object into a // list of URL query parameters function GFG_Fun() { let s = Object.keys(obj).map(function (key) { return key + '=' + obj[key]; }).join('&'); console.log("'" + s + "'"); } GFG_Fun(); Output{"p1":"GFG","p2":"Geeks","p3":"GeeksForGeeks"} 'p1=GFG&p2=Geeks&p3=GeeksForGeeks' Comment More infoAdvertise with us Next Article How to serialize an object into a list of URL query parameters using JavaScript ? P PranchalKatiyar Follow Improve Article Tags : JavaScript Web Technologies javascript-object JavaScript-Questions Similar Reads How to read properties of an Object in JavaScript ? Objects in JavaScript, it is the most important data type and forms the building blocks for modern JavaScript. 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