diff --git a/src/Filee.Core/Presets/BuiltInData.cs b/src/Filee.Core/Presets/BuiltInData.cs
index e1c69d961..8e041b974 100644
--- a/src/Filee.Core/Presets/BuiltInData.cs
+++ b/src/Filee.Core/Presets/BuiltInData.cs
@@ -739,7 +739,7 @@ public static List<ToolbarProfile> CreateProfiles()
             {
                 "images" => (["to-png", "to-jpg", "to-webp", "to-gif", "to-pdf", "trace-svg"],
                     ["tool-crop", "rotate", "remove-background", "merge-images", "compress-image", "half-size", "tool-image-edit", "zip-all"]),
-                "pdf" => (["to-png", "to-jpg", "to-docx", "pdf-slides", "to-txt", "to-hwpx", "to-hwp"],
+                "pdf" => (["to-png", "to-jpg", "to-docx", "to-xlsx", "pdf-slides", "to-txt", "to-hwpx", "to-hwp"],
                     ["pdf-edit", "pdf-split", "merge-pdf", "compress-pdf", "remove-metadata", "to-tiff", "to-html", "zip-all"]),
                 "office" => (["to-pdf", "to-hwpx", "to-hwp", "to-docx", "to-txt", "to-png", "merge-pdf"],
                     ["translate", "to-md", "pdf-long-image", "zip-all"]),
diff --git a/tests/Filee.Core.Tests/BackFaceTests.SlotTable.cs b/tests/Filee.Core.Tests/BackFaceTests.SlotTable.cs
index a867d7a46..72a6648d9 100644
--- a/tests/Filee.Core.Tests/BackFaceTests.SlotTable.cs
+++ b/tests/Filee.Core.Tests/BackFaceTests.SlotTable.cs
@@ -6,11 +6,12 @@ namespace Filee.Core.Tests;
 public partial class BackFaceTests
 {
     // Slot table of #806, with Translate from #836 first on the document, text and e-book backs, and Crop video (#830)
-    // after Cut a clip. This is a new-install/reset contract, not migration input.
+    // after Cut a clip, and XLSX (#1343) after Word on the PDF front. This is a new-install/reset contract, not
+    // migration input.
     internal static readonly Dictionary<string, (string[] Front, string[] Back)> ExpectedFaces = new()
     {
         ["images"] = (["to-png", "to-jpg", "to-webp", "to-gif", "to-pdf", "trace-svg"], ["tool-crop", "rotate", "remove-background", "merge-images", "compress-image", "half-size", "tool-image-edit", "zip-all"]),
-        ["pdf"] = (["to-png", "to-jpg", "to-docx", "pdf-slides", "to-txt", "to-hwpx", "to-hwp"], ["pdf-edit", "pdf-split", "merge-pdf", "compress-pdf", "remove-metadata", "to-tiff", "to-html", "zip-all"]),
+        ["pdf"] = (["to-png", "to-jpg", "to-docx", "to-xlsx", "pdf-slides", "to-txt", "to-hwpx", "to-hwp"], ["pdf-edit", "pdf-split", "merge-pdf", "compress-pdf", "remove-metadata", "to-tiff", "to-html", "zip-all"]),
         ["office"] = (["to-pdf", "to-hwpx", "to-hwp", "to-docx", "to-txt", "to-png", "merge-pdf"], ["translate", "to-md", "pdf-long-image", "zip-all"]),
         ["spreadsheets"] = (["to-pdf", "to-xlsx", "to-csv", "to-hwpx", "to-hwp", "merge-pdf"], ["tool-sheet-studio", "to-docx", "to-vcf", "to-ics", "zip-all"]),
         ["presentations"] = (["to-pdf", "to-png", "to-jpg", "to-pptx", "to-hwpx", "to-hwp", "merge-pdf"], ["to-odp", "pdf-long-image", "to-docx", "zip-all"]),
diff --git a/tests/Filee.Core.Tests/BackFaceTests.cs b/tests/Filee.Core.Tests/BackFaceTests.cs
index 767c0947f..3c2ebc267 100644
--- a/tests/Filee.Core.Tests/BackFaceTests.cs
+++ b/tests/Filee.Core.Tests/BackFaceTests.cs
@@ -235,8 +235,8 @@ public void Back_from_Filee_1_0_1_or_1_1_0_a_new_library_gets_its_new_back_faces
         // The fronts as read are the new ones, so the new back faces; the migrations before 30 then add front slots, and
         // v31, v33 and v37 back slots, as for any library of that schema.
         Assert.Equal(schema == 4
-            ? ["to-png", "to-jpg", "pdf-long-image", "to-docx", "pdf-slides", "to-hwp", "to-md", "to-epub"]
-            : ["to-png", "to-jpg", "pdf-long-image", "to-docx", "pdf-slides", "to-txt", "to-md", "to-epub", "to-hwpx", "to-hwp"],
+            ? ["to-png", "to-jpg", "pdf-long-image", "to-docx", "to-xlsx", "pdf-slides", "to-hwp", "to-md", "to-epub"]
+            : ["to-png", "to-jpg", "pdf-long-image", "to-docx", "to-xlsx", "pdf-slides", "to-txt", "to-md", "to-epub", "to-hwpx", "to-hwp"],
             Profile(back, "pdf").PresetIds);
         Assert.Equal(["pdf-edit", "pdf-split", "merge-pdf", "compress-pdf", "remove-metadata", "to-tiff", "to-html", "zip-all"],
             Profile(back, "pdf").BackPresetIds);
diff --git a/tests/Filee.Core.Tests/PdfXlsxSlotTests.cs b/tests/Filee.Core.Tests/PdfXlsxSlotTests.cs
new file mode 100644
index 000000000..c2651c0f4
--- /dev/null
+++ b/tests/Filee.Core.Tests/PdfXlsxSlotTests.cs
@@ -0,0 +1,30 @@
+// PDF → XLSX (#1343, #1187) works but was on no PDF donut, so people didn't find it. A new library has it on the PDF
+// front, after DOCX; an existing library keeps its donuts as they are (#806), and the user adds it from the palette.
+
+using Filee.Core.Presets;
+using Filee.Core.Profiles;
+
+namespace Filee.Core.Tests;
+
+public class PdfXlsxSlotTests
+{
+    private static ToolbarProfile Pdf(List<ToolbarProfile> profiles) => profiles.Single(p => p.Id == "pdf");
+
+    [Fact]
+    public void A_new_library_has_XLSX_on_the_PDF_front_after_DOCX()
+    {
+        var pdf = Pdf(BuiltInData.CreateProfiles());
+
+        Assert.Equal(pdf.PresetIds.IndexOf("to-docx") + 1, pdf.PresetIds.IndexOf("to-xlsx"));
+        Assert.DoesNotContain("to-xlsx", pdf.BackPresetIds!);
+    }
+
+    [Fact]
+    public void The_schema_58_PDF_donut_stays_without_it()
+    {
+        var pdf = Pdf(BuiltInData.ProfilesSchema58());
+
+        Assert.DoesNotContain("to-xlsx", pdf.PresetIds);
+        Assert.DoesNotContain("to-xlsx", pdf.BackPresetIds!);
+    }
+}