KnifeLemon · Oct 23, 2026 · Oct 22, 2026 · Oct 22, 2026 · Oct 22, 2026 · Oct 23, 2026
@@ -103,6 +103,7 @@
   "error.geo_unsupported_shape": "هذا النوع من الأشكال غير مدعوم",
   "error.geo_too_large": "سيتجاوز ملف Shapefile حد الصيغة البالغ 2 غيغابايت",
   "notice.pdf_not_smaller": "تعذّر تقليل الحجم، لذا نُسخ الملف كما هو",
+  "notice.empty_spreadsheet_pages_removed": "تمت إزالة صفحات جدول البيانات الفارغة",
   "notice.live_photo_pair": "حُفظ كصورة وملف MOV بالاسم نفسه. استوردهما معًا (صور iCloud أو AirDrop أو تطبيق الصور على Mac) لتحصل على Live Photo",
   "notice.geo_datum_assumed": "المرجع الجيوديسي ليس WGS 84؛ حُوّلت المواقع على افتراض أنه كذلك، وقد تنحرف بمقدار يصل إلى مئات الأمتار",
   "notice.geo_gpx_lossy": "تحتفظ GPX بالنقاط والمسارات والطرق مع حقول محدودة فقط: حُذفت السمات الأخرى وتحولت المضلعات إلى مسارات",

@@ -109,6 +109,7 @@
   "error.geo_unsupported_shape": "This kind of shape isn't supported",
   "error.geo_too_large": "The Shapefile would pass the format's 2 GB limit",
   "notice.pdf_not_smaller": "Couldn't make it smaller, so it was copied as it is",
+  "notice.empty_spreadsheet_pages_removed": "Empty spreadsheet pages were removed",
   "notice.live_photo_pair": "Saved as a photo and a MOV with the same name. Import both together (iCloud Photos, AirDrop or Photos on a Mac) to get a Live Photo",
   "notice.geo_datum_assumed": "The datum isn't WGS 84; positions were converted as if it were and can be off by up to hundreds of metres",
   "notice.geo_gpx_lossy": "GPX holds only points, routes and tracks with a few fields: other attributes were left out and polygons became tracks",

@@ -103,6 +103,7 @@
   "error.geo_unsupported_shape": "Este tipo de forma no es compatible",
   "error.geo_too_large": "El Shapefile superaría el límite de 2 GB del formato",
   "notice.pdf_not_smaller": "No se pudo reducir su tamaño, por lo que se copió tal cual",
+  "notice.empty_spreadsheet_pages_removed": "Se eliminaron las páginas vacías de la hoja de cálculo",
   "notice.live_photo_pair": "Guardado como una foto y un MOV con el mismo nombre. Impórtalos juntos (Fotos de iCloud, AirDrop o Fotos en un Mac) para obtener una Live Photo",
   "notice.geo_datum_assumed": "El datum no es WGS 84; las posiciones se convirtieron como si lo fuera y pueden desviarse hasta cientos de metros",
   "notice.geo_gpx_lossy": "GPX solo guarda puntos, rutas y tracks con pocos campos: se omitieron los demás atributos y los polígonos pasaron a ser tracks",

@@ -109,6 +109,7 @@
   "error.geo_unsupported_shape": "Ce type de forme n'est pas pris en charge",
   "error.geo_too_large": "Le Shapefile dépasserait la limite de 2 Go du format",
   "notice.pdf_not_smaller": "Impossible de réduire sa taille : le fichier a été copié tel quel",
+  "notice.empty_spreadsheet_pages_removed": "Les pages vides de la feuille de calcul ont été supprimées",
   "notice.live_photo_pair": "Enregistré en une photo et un MOV de même nom. Importez-les ensemble (Photos iCloud, AirDrop ou Photos sur Mac) pour obtenir une Live Photo",
   "notice.geo_datum_assumed": "Le datum n'est pas WGS 84 ; les positions ont été converties comme s'il l'était et peuvent être décalées de plusieurs centaines de mètres",
   "notice.geo_gpx_lossy": "GPX ne contient que des points, des routes et des traces avec quelques champs : les autres attributs ont été omis et les polygones sont devenus des traces",

@@ -103,6 +103,7 @@
   "error.geo_unsupported_shape": "इस तरह का आकार समर्थित नहीं है",
   "error.geo_too_large": "Shapefile फ़ॉर्मैट की 2 GB सीमा से बड़ी हो जाएगी",
   "notice.pdf_not_smaller": "इसे छोटा नहीं किया जा सका, इसलिए जैसा है वैसा ही कॉपी कर दिया गया",
+  "notice.empty_spreadsheet_pages_removed": "स्प्रेडशीट के खाली पृष्ठ हटा दिए गए",
   "notice.live_photo_pair": "एक ही नाम की फ़ोटो और MOV के रूप में सहेजा गया। लाइव फ़ोटो पाने के लिए दोनों को साथ में इम्पोर्ट करें (iCloud Photos, AirDrop या Mac पर Photos)",
   "notice.geo_datum_assumed": "डेटम WGS 84 नहीं है। स्थितियाँ ऐसे कन्वर्ट की गईं मानो वह WGS 84 हो, इसलिए वे कुछ सौ मीटर तक खिसक सकती हैं",
   "notice.geo_gpx_lossy": "GPX में केवल पॉइंट, रूट और ट्रैक कुछ फ़ील्ड के साथ रहते हैं: बाकी एट्रिब्यूट छोड़ दिए गए और पॉलीगॉन ट्रैक बन गए",

@@ -103,6 +103,7 @@
   "error.geo_unsupported_shape": "この種類の図形には対応していません",
   "error.geo_too_large": "Shapefile形式の上限（2 GB）を超えてしまいます",
   "notice.pdf_not_smaller": "サイズを小さくできなかったため、元のままコピーしました",
+  "notice.empty_spreadsheet_pages_removed": "スプレッドシートの空白ページを削除しました",
   "notice.live_photo_pair": "同じ名前の写真とMOVとして保存しました。両方を一緒に取り込むと（iCloud写真、AirDrop、Macの写真アプリ）Live Photoになります",
   "notice.geo_datum_assumed": "測地系がWGS 84ではありません。WGS 84とみなして変換したため、位置が最大で数百メートルずれることがあります",
   "notice.geo_gpx_lossy": "GPXに保存できるのはポイント、ルート、トラックと一部の項目だけです。そのほかの属性は省き、ポリゴンはトラックにしました",

@@ -109,6 +109,7 @@
   "error.geo_unsupported_shape": "지원하지 않는 도형 종류예요",
   "error.geo_too_large": "Shapefile의 한계인 2GB를 넘어요",
   "notice.pdf_not_smaller": "더 작게 만들 수 없어서 그대로 복사했어요",
+  "notice.empty_spreadsheet_pages_removed": "스프레드시트의 빈 페이지를 제거했어요",
   "notice.live_photo_pair": "같은 이름의 사진과 MOV로 저장했어요. 두 파일을 함께 가져오면(iCloud 사진, AirDrop, Mac의 사진 앱) 라이브 포토가 돼요",
   "notice.geo_datum_assumed": "측지계가 WGS 84가 아니라서 같은 것으로 보고 변환했어요. 위치가 수백 m까지 어긋날 수 있어요",
   "notice.geo_gpx_lossy": "GPX는 점·경로·트랙과 몇 가지 항목만 담아요. 다른 속성은 빠졌고 면은 트랙으로 바뀌었어요",

@@ -103,6 +103,7 @@
   "error.geo_unsupported_shape": "यस प्रकारको आकार समर्थित छैन",
   "error.geo_too_large": "Shapefile ढाँचाको २ GB सीमा नाघ्नेछ",
   "notice.pdf_not_smaller": "यसलाई सानो बनाउन सकिएन, त्यसैले जस्तो छ त्यस्तै प्रतिलिपि गरियो",
+  "notice.empty_spreadsheet_pages_removed": "स्प्रेडसिटका खाली पृष्ठहरू हटाइए",
   "notice.live_photo_pair": "एउटै नामको फोटो र MOV का रूपमा सुरक्षित गरियो। लाइभ फोटो पाउन दुवैलाई सँगै आयात गर्नुहोस् (iCloud Photos, AirDrop वा Mac मा Photos)",
   "notice.geo_datum_assumed": "डेटम WGS 84 होइन; स्थितिहरू यो WGS 84 भए जस्तै रूपान्तरण गरिए, जसले केही सय मिटरसम्म फरक पार्न सक्छ",
   "notice.geo_gpx_lossy": "GPX मा केही फिल्डसहित केवल पोइन्ट, रुट र ट्र्याक मात्र रहन्छन्: अन्य विशेषताहरू छोडियो र पोलिगनहरू ट्र्याक बने",

@@ -109,6 +109,7 @@
   "error.geo_unsupported_shape": "Ten rodzaj kształtu nie jest obsługiwany",
   "error.geo_too_large": "Shapefile przekroczyłby limit 2 GB tego formatu",
   "notice.pdf_not_smaller": "Nie udało się zmniejszyć pliku, więc skopiowano go bez zmian",
+  "notice.empty_spreadsheet_pages_removed": "Usunięto puste strony arkusza kalkulacyjnego",
   "notice.live_photo_pair": "Zapisano jako zdjęcie i plik MOV o tej samej nazwie. Zaimportuj je razem (Zdjęcia iCloud, AirDrop lub Zdjęcia na Macu), aby otrzymać Live Photo",
   "notice.geo_datum_assumed": "Datum nie jest WGS 84; pozycje przeliczono tak, jakby było, więc mogą się różnić nawet o setki metrów",
   "notice.geo_gpx_lossy": "GPX przechowuje tylko punkty, trasy i ślady z kilkoma polami: pozostałe atrybuty pominięto, a poligony stały się śladami",

@@ -109,6 +109,7 @@
   "error.geo_unsupported_shape": "Este tipo de forma não é compatível",
   "error.geo_too_large": "O Shapefile passaria do limite de 2 GB do formato",
   "notice.pdf_not_smaller": "Não deu para deixar menor, então foi copiado como está",
+  "notice.empty_spreadsheet_pages_removed": "As páginas vazias da planilha foram removidas",
   "notice.live_photo_pair": "Salvo como uma foto e um MOV com o mesmo nome. Importe os dois juntos (Fotos do iCloud, AirDrop ou Fotos no Mac) para obter uma Live Photo",
   "notice.geo_datum_assumed": "O datum não é WGS 84; as posições foram convertidas como se fosse, e podem errar em até centenas de metros",
   "notice.geo_gpx_lossy": "O GPX guarda só pontos, rotas e trilhas com poucos campos: outros atributos ficaram de fora e os polígonos viraram trilhas",

@@ -109,6 +109,7 @@
   "error.geo_unsupported_shape": "Такой тип фигуры не поддерживается",
   "error.geo_too_large": "Shapefile превысил бы предел формата в 2 ГБ",
   "notice.pdf_not_smaller": "Уменьшить не получилось, файл скопирован как есть",
+  "notice.empty_spreadsheet_pages_removed": "Пустые страницы таблицы удалены",
   "notice.live_photo_pair": "Сохранено как фото и MOV с одинаковым именем. Импортируйте их вместе (Фото iCloud, AirDrop или «Фото» на Mac), чтобы получить Live Photo",
   "notice.geo_datum_assumed": "Датум отличается от WGS 84; координаты пересчитаны как для WGS 84 и могут сместиться на сотни метров",
   "notice.geo_gpx_lossy": "GPX хранит только точки, маршруты и треки с небольшим набором полей: остальные атрибуты не вошли, а полигоны стали треками",

@@ -109,6 +109,7 @@
   "error.geo_unsupported_shape": "不支持此类形状",
   "error.geo_too_large": "将超过 Shapefile 2 GB 的上限",
   "notice.pdf_not_smaller": "无法再缩小，已原样复制",
+  "notice.empty_spreadsheet_pages_removed": "已移除电子表格中的空白页面",
   "notice.live_photo_pair": "已保存为同名的照片和 MOV。将两者一起导入（iCloud 照片、隔空投送或 Mac 上的“照片”）即可得到实况照片",
   "notice.geo_datum_assumed": "基准面不是 WGS 84，已按相同处理，位置可能偏差数百米",
   "notice.geo_gpx_lossy": "GPX 只能保存点、路线和轨迹及少数字段，其他属性已省略，面变成了轨迹",

@@ -109,6 +109,7 @@
   "error.geo_unsupported_shape": "不支援此類形狀",
   "error.geo_too_large": "將超過 Shapefile 2 GB 的上限",
   "notice.pdf_not_smaller": "無法再縮小，已原樣複製",
+  "notice.empty_spreadsheet_pages_removed": "已移除試算表中的空白頁面",
   "notice.live_photo_pair": "已儲存為同名的照片和 MOV。將兩者一起匯入（iCloud 照片、隔空投送或 Mac 上的「照片」）即可得到原況照片",
   "notice.geo_datum_assumed": "基準面不是 WGS 84，已按相同處理，位置可能偏差數百公尺",
   "notice.geo_gpx_lossy": "GPX 只能儲存點、路線和軌跡及少數字段，其他屬性已省略，面變成了軌跡",

@@ -20,6 +20,7 @@
 using Filee.Core.Conversion;
 using Filee.Core.Formats;
 using Filee.Engines.Infrastructure;
+using Filee.Engines.Pdf;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Logging.Abstractions;
 using PdfSharp.Pdf;
@@ -127,6 +128,24 @@ public async Task<IReadOnlyList<string>> ConvertAsync(ConversionStep step, IProg
                 throw new InvalidOperationException(
                     $"LibreOffice produced no output (exit {result.ExitCode}). {result.StandardError.Trim()}");
 
+            // Calc sometimes turns stale Excel print tiles into completely empty PDF pages anywhere in the output.
+            // Only remove pages with no painting operation at all; pages containing text, borders, charts, pictures
+            // or annotations stay. PDF/A is never rewritten: doing so would invalidate LibreOffice's XMP metadata.
+            try
+            {
+                var removed = RemoveEmptySpreadsheetPages(step, produced);
+                if (removed > 0)
+                {
+                    _logger.LogInformation("{File}: removed {Count} empty spreadsheet PDF pages", step.InputPath, removed);
+                    step.Notice?.Invoke("notice.empty_spreadsheet_pages_removed");
+                }
+            }
+            catch (Exception e) when (e is not OperationCanceledException)
+            {
+                // Post-processing is an improvement, not a reason to discard LibreOffice's otherwise valid PDF.
+                _logger.LogInformation("{File}: could not check empty spreadsheet PDF pages: {Message}", step.InputPath, e.Message);
+            }
+
             var target = step.Output.Allocate(step.To);
             if (target is null)
                 return [];
@@ -140,6 +159,15 @@ public async Task<IReadOnlyList<string>> ConvertAsync(ConversionStep step, IProg
         }
     }
 
+    /// <summary>
+    /// Removes empty Calc PDF pages when that post-processing is safe. PDF/A stays byte-for-byte as LibreOffice wrote
+    /// it because PDFsharp changes the Info dictionary without updating the archival XMP metadata.
+    /// </summary>
+    internal static int RemoveEmptySpreadsheetPages(ConversionStep step, string path) =>
+        step.To == "pdf" && !step.Preset.Document.PdfA
+        && FamilyOf(step.From, FormatRegistry.ExtensionOf(step.InputPath)) == "calc"
+            ? PdfBlankPages.Remove(path) : 0;
+
     /// <summary>Runs LibreOffice into a fresh folder; returns the file it wrote (null if none) and how it ended.</summary>
     private async Task<(string? Produced, ProcessResult Result)> ConvertOnceAsync(string soffice, int slot, string filter, string workDirectory,
         string input, IProgress<double>? progress, CancellationToken cancellationToken)

@@ -0,0 +1,85 @@
+// Removes pages that contain no painting operations at all. This is deliberately stricter than "no text": charts,
+// borders, pictures, annotations and even a deliberately painted white rectangle keep a page. LibreOffice Calc can
+// append empty tiles when an imported spreadsheet's saved print range is wider or taller than its actual content.
+
+using PdfSharp.Pdf;
+using PdfSharp.Pdf.Content;
+using PdfSharp.Pdf.Content.Objects;
+using PdfSharp.Pdf.IO;
+
+namespace Filee.Engines.Pdf;
+
+internal static class PdfBlankPages
+{
+    /// <summary>Operators that can put a visible mark on a page.</summary>
+    private static readonly HashSet<OpCodeName> Paint =
+    [
+        // Stroke / fill the current path.
+        OpCodeName.S, OpCodeName.s, OpCodeName.f, OpCodeName.F, OpCodeName.fx,
+        OpCodeName.B, OpCodeName.Bx, OpCodeName.b, OpCodeName.bx,
+        // XObjects, inline images and shadings.
+        OpCodeName.Do, OpCodeName.BI, OpCodeName.sh,
+        // Show text. Count it even when it happens to be empty or invisible: uncertain pages must stay.
+        OpCodeName.Tj, OpCodeName.TJ, OpCodeName.QuoteSingle, OpCodeName.QuoteDouble, OpCodeName.Tx,
+    ];
+
+    /// <summary>
+    /// Removes pages with no painting operators from <paramref name="path"/>, replacing it only after the cleaned PDF
+    /// was saved successfully. A wholly blank document is left alone: a valid PDF still needs a page, and an empty
+    /// workbook may have meant to produce one.
+    /// </summary>
+    /// <returns>The number of pages removed.</returns>
+    public static int Remove(string path)
+    {
+        var fullPath = Path.GetFullPath(path);
+        var temp = Path.Combine(Path.GetDirectoryName(fullPath)!, $".{Path.GetFileNameWithoutExtension(path)}-{Guid.NewGuid():N}.pdf");
+        try
+        {
+            int removed;
+            using (var document = PdfReader.Open(fullPath, PdfDocumentOpenMode.Modify))
+            {
+                var blank = Enumerable.Range(0, document.PageCount).Where(i => IsBlank(document.Pages[i])).ToList();
+                if (blank.Count == 0 || blank.Count == document.PageCount)
+                    return 0;
+
+                for (var i = blank.Count - 1; i >= 0; i--)
+                    document.Pages.RemoveAt(blank[i]);
+                removed = blank.Count;
+                document.Save(temp);
+            }
+            File.Move(temp, fullPath, overwrite: true);
+            return removed;
+        }
+        finally
+        {
+            try { File.Delete(temp); } catch (IOException) { } catch (UnauthorizedAccessException) { }
+        }
+    }
+
+    /// <summary>Unreadable content is not blank: uncertainty must never delete a user's page.</summary>
+    internal static bool IsBlank(PdfPage page)
+    {
+        if (page.Elements.GetArray("/Annots") is { Elements.Count: > 0 })
+            return false;
+        try
+        {
+            return !Paints(ContentReader.ReadContent(page));
+        }
+        catch (Exception ex) when (ex is not OperationCanceledException)
+        {
+            return false;
+        }
+    }
+
+    private static bool Paints(CSequence content)
+    {
+        foreach (var item in content)
+        {
+            if (item is COperator op && Paint.Contains(op.OpCode.OpCodeName))
+                return true;
+            if (item is CSequence nested && Paints(nested))
+                return true;
+        }
+        return false;
+    }
+}