diff --git a/.changeset/embed-playback-bar-hover-scrollbar.md b/.changeset/embed-playback-bar-hover-scrollbar.md
new file mode 100644
index 00000000000..c9b61c880cd
--- /dev/null
+++ b/.changeset/embed-playback-bar-hover-scrollbar.md
@@ -0,0 +1,5 @@
+---
+"@hashintel/petrinaut": patch
+---
+
+The embedded preview's playback bar scrolls only sideways, so resting the pointer on one of its controls no longer shows a vertical scrollbar inside the bar.
diff --git a/libs/@hashintel/petrinaut/src/ui/preview/preview-quick-simulation-controls.tsx b/libs/@hashintel/petrinaut/src/ui/preview/preview-quick-simulation-controls.tsx
index 88026c19b7d..37801818d24 100644
--- a/libs/@hashintel/petrinaut/src/ui/preview/preview-quick-simulation-controls.tsx
+++ b/libs/@hashintel/petrinaut/src/ui/preview/preview-quick-simulation-controls.tsx
@@ -58,7 +58,13 @@ const playbackPositionStyle = css({
 const playbackControlsScrollStyle = css({
   width: "full",
   minWidth: "0",
+  // A narrow embed scrolls the row sideways to reach the controls at its end.
+  // Setting overflow on one axis makes the other axis scroll as well unless it
+  // is set too, and a toolbar button's hover scale counts towards the
+  // scrollable area though it takes no layout space: a pointer resting on a
+  // button would otherwise show a vertical scrollbar.
   overflowX: "auto",
+  overflowY: "hidden",
 });
 
 const playbackControlsRowStyle = css({