diff --git a/mediarepo-ui/src/app/components/file-search/filter-dialog/filter-dialog.component.html b/mediarepo-ui/src/app/components/file-search/filter-dialog/filter-dialog.component.html
index c5762b8..3d76050 100644
--- a/mediarepo-ui/src/app/components/file-search/filter-dialog/filter-dialog.component.html
+++ b/mediarepo-ui/src/app/components/file-search/filter-dialog/filter-dialog.component.html
@@ -19,4 +19,5 @@
 <app-context-menu #contextMenu>
   <button mat-menu-item (click)="this.convertSelectionToOrExpression()">Copy to OR-Expression</button>
   <button mat-menu-item (click)="this.convertSelectionToAndExpression()">Copy to AND-Expression</button>
+  <button mat-menu-item (click)="this.invertSelection()">Invert</button>
 </app-context-menu>
diff --git a/mediarepo-ui/src/app/components/file-search/filter-dialog/filter-dialog.component.ts b/mediarepo-ui/src/app/components/file-search/filter-dialog/filter-dialog.component.ts
index e5e9f45..ce97c95 100644
--- a/mediarepo-ui/src/app/components/file-search/filter-dialog/filter-dialog.component.ts
+++ b/mediarepo-ui/src/app/components/file-search/filter-dialog/filter-dialog.component.ts
@@ -111,6 +111,10 @@ export class FilterDialogComponent {
     this.unselectAll();
   }
 
+  public invertSelection(): void {
+    this.selectedQueries.forEach(query => query.negate = !query.negate);
+  }
+
   private removeFilterDuplicates() {
     const filters = this.filters;
     let newFilters: Selectable<FilterExpression>[] = [];