diff --git a/algorithms/javascript/merge-sort.js b/algorithms/javascript/merge-sort.js
new file mode 100644
index 0000000..d94aae4
--- /dev/null
+++ b/algorithms/javascript/merge-sort.js
@@ -0,0 +1,10 @@
+function mergeSort(arr) {
+  // Base case
+  if (arr.length <= 1) return arr
+  let mid = Math.floor(arr.length / 2)
+  // Recursive calls
+  let left = mergeSort(arr.slice(0, mid))
+  let right = mergeSort(arr.slice(mid))
+  return merge(left, right)
+}
+mergeSort([3, 5, 8, 5, 99, 1]) // [1, 3, 5, 5, 8, 99]