diff --git a/setup.cfg b/setup.cfg
index 4e4e5ec..25f8c14 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -34,6 +34,7 @@ install_requires =
     aiida-core
     aiidalab-widgets-base
     aiida-chemshell>=0.1.5
+    rdkit
 
 python_requires = >=3.10
 
diff --git a/src/aiidalab_chemshell/wizards/structure.py b/src/aiidalab_chemshell/wizards/structure.py
index d1b1716..055f1d3 100644
--- a/src/aiidalab_chemshell/wizards/structure.py
+++ b/src/aiidalab_chemshell/wizards/structure.py
@@ -65,11 +65,18 @@ def __init__(self, model: StructureInputModel, **kwargs):
         )
         ipw.dlink((self.database_widget, "data_object"), (self.model, "structure_file"))
 
-        self.tabs.children = [self.file_input_widget, self.database_widget]
-        for i, title in enumerate(["Upload File", "AiiDA Database"]):
+        self.smiles_widget = awb.SmilesWidget(title="SMILES")
+
+        self.tabs.children = [
+            self.file_input_widget,
+            self.database_widget,
+            self.smiles_widget,
+        ]
+        for i, title in enumerate(["Upload File", "AiiDA Database", "SMILES String"]):
             self.tabs.set_title(i, title)
 
         self.model.observe(self._on_file_upload, "structure_file")
+        self.smiles_widget.observe(self._on_smiles_generation, "structure")
 
     def render(self):
         """Render the wizard's contents if not already rendered."""
@@ -116,6 +123,14 @@ def _on_file_upload(self, change=None):
             self._update_children()
         return
 
+    def _on_smiles_generation(self, change=None):
+        """When SMILES string is inputted."""
+        self.viewer = awb.viewers.StructureDataViewer(
+            structure=self.smiles_widget.structure
+        )
+        self._update_children()
+        return
+
     def _get_ase_object_from_file(self, fname: str, content: bytes) -> ase.Atoms | None:
         suffix = "".join(Path(fname).suffixes)
         with NamedTemporaryFile(suffix=suffix) as tmpf: