Office Document Conversion

Working Examples

Convert and merge Office documents (Word, Excel, PowerPoint, and 100+ formats) to PDF using LibreOffice.

Basic Merge

var builder = new MergeOfficeBuilder()
    .WithAsyncAssets(async a => a.AddItems(await GetDocsAsync(sourceDirectory)))
    .SetPdfOutputOptions(o => o.SetPdfFormat(PdfFormat.A2b));

var result = await sharpClient.MergeOfficeDocsAsync(builder);

LibreOffice Options

Fine-tune conversions with LibreOffice-specific options:

var builder = new MergeOfficeBuilder()
    .WithAsyncAssets(async a => a.AddItems(await GetDocsAsync(sourceDirectory)))
    .SetLibreOfficeOptions(o => o
        // Image compression
        .SetQuality(85)                     // JPEG quality 1-100
        .SetReduceImageResolution()
        .SetMaxImageResolution(300)         // DPI: 75, 150, 300, 600, 1200
        // Export options
        .SetExportBookmarks()
        .SetExportFormFields(false)         // Flatten form fields
        .SetUpdateIndexes()
        // Native watermark
        .SetNativeWatermarkText("DRAFT")
        .SetNativeWatermarkFontName("Arial")
        .SetNativeWatermarkFontHeight(48))
    .SetPdfOutputOptions(o => o.SetPdfFormat(PdfFormat.A2b));

All LibreOffice Options

Layout

Method	Description	Default
`SetSinglePageSheets()`	One page per sheet	false
`SetSkipEmptyPages()`	Skip empty pages (Writer only)	false
`SetExportPlaceholders()`	Render placeholders as visual markers	false

Image Compression

Method	Description	Default
`SetLosslessImageCompression()`	Use PNG instead of JPEG	false
`SetQuality(1-100)`	JPEG quality	90
`SetReduceImageResolution()`	Reduce to max DPI	false
`SetMaxImageResolution(dpi)`	Max DPI (75/150/300/600/1200)	300

Notes & Slides

Method	Description	Default
`SetExportNotes()`	Export notes to PDF	false
`SetExportNotesPages()`	Export notes pages (Impress)	false
`SetExportOnlyNotesPages()`	Export only notes pages	false
`SetExportNotesInMargin()`	Notes in margin	false
`SetExportHiddenSlides()`	Include hidden slides	false

Links & Outline

Method	Description	Default
`SetConvertOooTargetToPdfTarget()`	Convert .od* links to .pdf	false
`SetExportLinksRelativeFsys()`	Relative file:// links	false
`SetUpdateIndexes()`	Update TOC before conversion	true
`SetExportBookmarks()`	Export bookmarks	true
`SetExportBookmarksToPdfDestination()`	Bookmarks as Named Destinations	false
`SetAddOriginalDocumentAsStream()`	Embed original document	false

Form Fields

Method	Description	Default
`SetExportFormFields(bool)`	Export as interactive widgets	true
`SetAllowDuplicateFieldNames()`	Allow duplicate field names	false

Native Watermark

Method	Description
`SetNativeWatermarkText(text)`	Single-line text watermark
`SetNativeTiledWatermarkText(text)`	Repeating tiled watermark
`SetNativeWatermarkColor(rgbDecimal)`	RGB color as decimal (default: 8388223)
`SetNativeWatermarkFontName(font)`	Font name (default: Helvetica)
`SetNativeWatermarkFontHeight(pts)`	Font size in points (0 = auto)
`SetNativeWatermarkRotateAngle(angle)`	Rotation in tenths of degrees

Source File Password

builder.SetLibreOfficeOptions(o => o.SetPassword("document-password"));