diff --git a/modules/decima-ui/src/main/java/com/shade/decima/ui/Application.java b/modules/decima-ui/src/main/java/com/shade/decima/ui/Application.java
index fe57c6ab..0dc0de40 100644
--- a/modules/decima-ui/src/main/java/com/shade/decima/ui/Application.java
+++ b/modules/decima-ui/src/main/java/com/shade/decima/ui/Application.java
@@ -371,6 +371,8 @@ private void configureUI() {
         UIManager.put("Action.splitDownIcon", new FlatSVGIcon("icons/actions/split_down.svg"));
         UIManager.put("Action.splitRightIcon", new FlatSVGIcon("icons/actions/split_right.svg"));
         UIManager.put("Action.starIcon", new FlatSVGIcon("icons/actions/star.svg"));
+        UIManager.put("Action.lowerCaseIcon", new FlatSVGIcon("icons/actions/lowercase.svg"));
+        UIManager.put("Action.upperCaseIcon", new FlatSVGIcon("icons/actions/uppercase.svg"));
         UIManager.put("Action.undoIcon", new FlatSVGIcon("icons/actions/undo.svg"));
         UIManager.put("Action.wireframeIcon", new FlatSVGIcon("icons/actions/wireframe.svg"));
         UIManager.put("Action.zoomFitIcon", new FlatSVGIcon("icons/actions/zoom_fit.svg"));
diff --git a/modules/decima-ui/src/main/java/com/shade/decima/ui/dialogs/HashToolDialog.java b/modules/decima-ui/src/main/java/com/shade/decima/ui/dialogs/HashToolDialog.java
index 1ae30e08..a91e8d3f 100644
--- a/modules/decima-ui/src/main/java/com/shade/decima/ui/dialogs/HashToolDialog.java
+++ b/modules/decima-ui/src/main/java/com/shade/decima/ui/dialogs/HashToolDialog.java
@@ -55,16 +55,35 @@ public void windowDeactivated(WindowEvent e) {
     private static class ContentPanel extends JPanel {
         private final List<HasherInfo> converters = new ArrayList<>();
         private final JTextField inputField;
+        private final JToggleButton upperCaseButton;
+        private final JToggleButton lowerCaseButton;
         private final JToggleButton nullTerminatedButton;
 
         public ContentPanel() {
-            setLayout(new MigLayout("ins dialog,wrap 3", "[][grow,fill,150lp]"));
+            setLayout(new MigLayout("ins dialog,wrap 3", "[][grow,fill,200lp]"));
+
+            upperCaseButton = new JToggleButton(UIManager.getIcon("Action.upperCaseIcon"));
+            upperCaseButton.setToolTipText("Treat as uppercase");
+
+            lowerCaseButton = new JToggleButton(UIManager.getIcon("Action.lowerCaseIcon"));
+            lowerCaseButton.setToolTipText("Treat as lowercase");
 
             nullTerminatedButton = new JToggleButton(UIManager.getIcon("Action.nullTerminatorIcon"));
-            nullTerminatedButton.setToolTipText("Null-terminated string");
+            nullTerminatedButton.setToolTipText("Include null terminator");
+
+            upperCaseButton.addActionListener(e -> {
+                lowerCaseButton.setSelected(false);
+                update();
+            });
+            lowerCaseButton.addActionListener(e -> {
+                upperCaseButton.setSelected(false);
+                update();
+            });
             nullTerminatedButton.addActionListener(e -> update());
 
             final JToolBar toolBar = new JToolBar();
+            toolBar.add(upperCaseButton);
+            toolBar.add(lowerCaseButton);
             toolBar.add(nullTerminatedButton);
 
             inputField = new JTextField();
@@ -73,6 +92,7 @@ public ContentPanel() {
 
             add(new JLabel("Text:"));
             add(inputField, "span 2");
+            add(new JSeparator(), "growx,span 3");
 
             for (Hasher hasher : Hasher.availableHashers()) {
                 final JTextField decField = new JTextField();
@@ -92,7 +112,15 @@ public ContentPanel() {
         }
 
         private void update() {
-            byte[] data = inputField.getText().getBytes(StandardCharsets.UTF_8);
+            String text = inputField.getText();
+
+            if (upperCaseButton.isSelected()) {
+                text = text.toUpperCase();
+            } else if (lowerCaseButton.isSelected()) {
+                text = text.toLowerCase();
+            }
+
+            byte[] data = text.getBytes(StandardCharsets.UTF_8);
 
             if (nullTerminatedButton.isSelected()) {
                 data = Arrays.copyOf(data, data.length + 1);
diff --git a/modules/decima-ui/src/main/resources/icons/actions/lowercase.svg b/modules/decima-ui/src/main/resources/icons/actions/lowercase.svg
new file mode 100644
index 00000000..8f3d80c9
--- /dev/null
+++ b/modules/decima-ui/src/main/resources/icons/actions/lowercase.svg
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <title>actions-lowercase</title>
+  <g>
+    <path d="m7.49,12.5l-.85-2.49h-3.31l-.85,2.49h-1.5L4.22,3.5h1.57l3.21,9h-1.51Zm-1.21-3.75l-.82-2.46c-.03-.11-.08-.26-.14-.45s-.12-.39-.18-.59-.11-.38-.15-.51c-.04.17-.09.35-.14.56s-.11.4-.17.58-.09.32-.12.41l-.83,2.46h2.54Z" fill="#6c707e"/>
+    <polyline points="15.5 9 12.5 12 9.5 9" fill="none" stroke="#3574f0" stroke-linecap="round" stroke-linejoin="round"/>
+    <line x1="12.5" y1="12" x2="12.5" y2="3" fill="none" stroke="#3574f0" stroke-miterlimit="10"/>
+  </g>
+</svg>
diff --git a/modules/decima-ui/src/main/resources/icons/actions/null_terminator.svg b/modules/decima-ui/src/main/resources/icons/actions/null_terminator.svg
index 76f3589e..b15a9376 100644
--- a/modules/decima-ui/src/main/resources/icons/actions/null_terminator.svg
+++ b/modules/decima-ui/src/main/resources/icons/actions/null_terminator.svg
@@ -1,7 +1,8 @@
 <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
   <title>actions-null_terminator</title>
   <g>
-    <path d="M3.1,3.1l3.7,9.8H5.6L2,3.1Z" fill="#6c707e"/>
-    <path d="M14,8a15,15,0,0,1-.2,2.2,3.82,3.82,0,0,1-.6,1.6,3.18,3.18,0,0,1-1,1,2.39,2.39,0,0,1-1.5.3,2.61,2.61,0,0,1-1.8-.6,2.46,2.46,0,0,1-1-1.7A12,12,0,0,1,7.6,8a10.59,10.59,0,0,1,.3-2.7,2.6,2.6,0,0,1,1-1.7A3.29,3.29,0,0,1,10.8,3a2.44,2.44,0,0,1,1.8.6,2.88,2.88,0,0,1,1,1.7A7.32,7.32,0,0,1,14,8ZM8.7,8a15.16,15.16,0,0,0,.2,2.3,2.1,2.1,0,0,0,.7,1.4,1.59,1.59,0,0,0,1.2.4,2.14,2.14,0,0,0,1.2-.4,3.65,3.65,0,0,0,.7-1.4A8,8,0,0,0,12.8,8a12.73,12.73,0,0,0-.2-2.2A2.59,2.59,0,0,0,12,4.4,1.46,1.46,0,0,0,10.8,4a2.14,2.14,0,0,0-1.2.4,2.31,2.31,0,0,0-.7,1.4A12.73,12.73,0,0,0,8.7,8Z" fill="#6c707e"/>
+    <path d="m4.9,10.92h-1.18L.84,6.19h-.04c.01.16.02.33.03.51,0,.18.02.36.02.55s.01.38.02.57v3.09h-.88v-5.92h1.18l2.87,4.69h.03c0-.14-.01-.29-.02-.47s-.01-.36-.02-.55c0-.19-.01-.37-.01-.55v-3.11h.88v5.92Z" fill="#6c707e"/>
+    <path d="m11.05,5v3.83c0,.41-.09.78-.26,1.11-.17.33-.43.59-.78.78-.35.19-.79.29-1.31.29-.75,0-1.32-.2-1.72-.6s-.59-.93-.59-1.59v-3.81h.97v3.73c0,.49.11.86.35,1.09.23.23.57.35,1.03.35.31,0,.57-.06.77-.17s.35-.28.44-.49c.1-.22.14-.48.14-.79v-3.72h.96Z" fill="#6c707e"/>
+    <path d="m12.54,10.92v-5.92h.96v5.09h2.49v.83h-3.46Z" fill="#6c707e"/>
   </g>
 </svg>
diff --git a/modules/decima-ui/src/main/resources/icons/actions/uppercase.svg b/modules/decima-ui/src/main/resources/icons/actions/uppercase.svg
new file mode 100644
index 00000000..46d4d500
--- /dev/null
+++ b/modules/decima-ui/src/main/resources/icons/actions/uppercase.svg
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+  <title>actions-uppercase</title>
+  <g>
+    <path d="m4.28,5.5c.9,0,1.57.19,2.03.57s.69.97.69,1.77v4.54h-1.07l-.29-.96h-.05c-.2.24-.41.45-.62.61s-.46.28-.74.36-.62.12-1.02.12c-.43,0-.81-.07-1.14-.22s-.59-.38-.78-.68-.28-.69-.28-1.16c0-.7.27-1.22.82-1.57s1.37-.54,2.47-.58l1.22-.04v-.35c0-.46-.11-.79-.34-.99s-.55-.3-.96-.3c-.35,0-.7.05-1.03.15s-.66.22-.97.35l-.49-1.01c.35-.17.75-.32,1.19-.43s.9-.16,1.38-.16Zm1.22,3.65l-.91.04c-.75.02-1.28.15-1.58.36s-.45.52-.45.9c0,.33.1.58.31.73s.48.23.83.23c.52,0,.95-.14,1.29-.42s.51-.7.51-1.24v-.59Z" fill="#6c707e"/>
+    <polyline points="8.5 7 11.5 4 14.5 7" fill="none" stroke="#3574f0" stroke-linecap="round" stroke-linejoin="round"/>
+    <line x1="11.5" y1="4" x2="11.5" y2="13" fill="none" stroke="#3574f0" stroke-miterlimit="10"/>
+  </g>
+</svg>