diff --git a/frontend/src/components/DataGrid.layout.test.tsx b/frontend/src/components/DataGrid.layout.test.tsx
index 32a927f..7897c4b 100644
--- a/frontend/src/components/DataGrid.layout.test.tsx
+++ b/frontend/src/components/DataGrid.layout.test.tsx
@@ -433,6 +433,15 @@ describe('DataGrid layout', () => {
     expect(source).toContain('.${gridId} .data-grid-inline-editor-input');
   });
 
+  it('disables browser autocapitalization for inline cell editors', () => {
+    const source = readFileSync(new URL('./DataGrid.tsx', import.meta.url), 'utf8');
+
+    const editorInputCount = source.match(/\{\.\.\.noAutoCapInputProps\}[\s\S]{0,180}className="data-grid-inline-editor-input"/g)?.length || 0;
+
+    expect(source).toContain("import { applyNoAutoCapAttributesWithin, noAutoCapInputProps } from '../utils/inputAutoCap';");
+    expect(editorInputCount).toBe(2);
+  });
+
   it('renders a quick WHERE condition editor when table filters are visible', () => {
     const markup = renderToStaticMarkup(
       <DataGrid
diff --git a/frontend/src/components/DataGrid.tsx b/frontend/src/components/DataGrid.tsx
index ab0ebb4..08c2c05 100644
--- a/frontend/src/components/DataGrid.tsx
+++ b/frontend/src/components/DataGrid.tsx
@@ -1018,6 +1018,7 @@ const EditableCell: React.FC<EditableCellProps> = React.memo(({
           )
         ) : (
           <Input
+            {...noAutoCapInputProps}
             ref={inputRef}
             className="data-grid-inline-editor-input"
             style={{ width: '100%', ...inputCellPadding }}
@@ -5039,6 +5040,7 @@ const DataGrid: React.FC<DataGridProps> = ({
                                       )
                                   ) : (
                                       <Input
+                                          {...noAutoCapInputProps}
                                           ref={virtualInlineInputRef}
                                           className="data-grid-inline-editor-input"
                                           style={{ width: '100%', ...inputCellPadding }}