how to combine multiple .js files into one js file for website?

Hi

i want to combine multiple js file in to one js file. I am using website  called multiple js file this affected in page loading website is loading very slow just look my code in below please help me.

    <!-- LOAD JS FILES -->
    <script src="js/jquery.min.js"></script>
    <script src="js/bootstrap.min.js"></script>
    <script src="js/easing.js"></script>
    <script src="js/owl.carousel.js"></script>
    <script src="js/jquery.fitvids.js"></script>    
    <script src="js/wow.min.js"></script>
    <script src="js/jquery.magnific-popup.min.js"></script>

    <!-- Waypoints-->
    <script src="js/jquery.waypoints.min.js"></script>
    <script src="js/sticky.min.js"></script>
    <script src="js/tipper.js"></script>
    <script src="js/compact.js"></script>
    <script src="js/custom-index1.js"></script>
   <script src="js/material.min.js"></script>

        <!-- Typed
        =====================================-->
        <script src="assets/js/typed/typed.min.js"></script>
       
        <!-- JQuery Main
        =====================================-->
        <script src="assets/js/main/jquery.appear.js"></script>
        <script src="assets/js/main/imagesloaded.pkgd.min.js"></script>
        <script src="assets/js/main/main.js"></script>

I want in one js file