diff --git a/src/js/database/BackupDatabase.js b/src/js/database/BackupDatabase.js
index 26b60cd..6688c3a 100644
--- a/src/js/database/BackupDatabase.js
+++ b/src/js/database/BackupDatabase.js
@@ -25,7 +25,7 @@
 
   /**
    * Open and initialize the database.
-   * Returns a promise that resolves when the databse is opened.
+   * Returns a promise that resolves when the database is opened.
    */
   ns.BackupDatabase.prototype.init = function () {
     var request = window.indexedDB.open(DB_NAME, DB_VERSION);
diff --git a/src/js/tools/drawing/selection/BaseSelect.js b/src/js/tools/drawing/selection/BaseSelect.js
index 24d7721..8d91735 100644
--- a/src/js/tools/drawing/selection/BaseSelect.js
+++ b/src/js/tools/drawing/selection/BaseSelect.js
@@ -42,7 +42,7 @@
     this.lastMoveRow = row;
 
     // The select tool can be in two different state.
-    // If the inital click of the tool is not on a selection, we go in 'select'
+    // If the initial click of the tool is not on a selection, we go in 'select'
     // mode to create a selection.
     // If the initial click is on a previous selection, we go in 'moveSelection'
     // mode to allow to move the selection by drag'n dropping it.
diff --git a/src/js/tools/drawing/selection/RectangleSelect.js b/src/js/tools/drawing/selection/RectangleSelect.js
index ede0643..d76ca04 100644
--- a/src/js/tools/drawing/selection/RectangleSelect.js
+++ b/src/js/tools/drawing/selection/RectangleSelect.js
@@ -24,8 +24,8 @@
 
   /**
    * When creating the rectangle selection, we clear the current overlayFrame and
-   * redraw the current rectangle based on the orgin coordinate and
-   * the current mouse coordiinate in sprite.
+   * redraw the current rectangle based on the origin coordinate and
+   * the current mouse coordinate in sprite.
    * @override
    */
   ns.RectangleSelect.prototype.onDragSelect_ = function (col, row, frame, overlay) {
diff --git a/src/js/tools/drawing/selection/ShapeSelect.js b/src/js/tools/drawing/selection/ShapeSelect.js
index 9903af2..dcc7855 100644
--- a/src/js/tools/drawing/selection/ShapeSelect.js
+++ b/src/js/tools/drawing/selection/ShapeSelect.js
@@ -18,7 +18,7 @@
 
   /**
    * For the shape select tool, you just need to click one time to create a selection.
-   * So we jsut need to implement onSelectStart_ (no need for onSelect_ & onSelectEnd_)
+   * So we just need to implement onSelectStart_ (no need for onSelect_ & onSelectEnd_)
    * @override
    */
   ns.ShapeSelect.prototype.onSelectStart_ = function (col, row, frame, overlay) {