GroupDocs.Editor is a server-side document editing SDK for .NET and Java that converts popular office formats to clean HTML for in-browser editing, then renders back to DOCX, XLSX, PPTX, PDF, HTML, or TXT with layout, fonts, and resources preserved. Build secure, self-hosted editors without Office Automation.

• Published GroupDocs.Editor 25.12 with faster HTML generation, improved font embedding, and smaller resource bundles.
• Added sample flows for DOCX → editable HTML → DOCX/PDF and multi-sheet XLSX editing in .NET and Java examples.

Native .NET library that converts Office documents to WYSIWYG HTML for front-end editors, then saves back to Office/PDF.

• GroupDocs.Editor-for-.NET: Core API with flow/paged Word editing, spreadsheet worksheets, slide notes, and resource extraction.
  Repo & examples: https://github.com/groupdocs-editor/GroupDocs.Editor-for-.NET/tree/master/Examples
  UI companion: https://github.com/groupdocs-editor/GroupDocs.Editor-for-.NET-UI

// Convert DOCX to editable HTML, then save edited content back to DOCX
using (var editor = new Editor("Templates/Contract.docx"))
{
    var editOptions = new WordProcessingEditOptions();
    EditableDocument htmlDoc = editor.Edit(editOptions);
    string html = htmlDoc.GetContent(); // send to your WYSIWYG editor

    // ... user edits HTML/embedded resources ...

    var saveOptions = new WordProcessingSaveOptions(WordProcessingFormats.Docx);
    editor.Save(htmlDoc, "Reports/Contract-Edited.docx", saveOptions);
}

Java API for converting Office/HTML/TXT to editable HTML and saving back with layout fidelity.

• GroupDocs.Editor-for-Java: Full Java engine with worksheet selection, HTML/CSS resource handling, and PDF output.
  Repo: https://github.com/groupdocs-editor/GroupDocs.Editor-for-Java

// Convert XLSX sheet to HTML, edit, then save back to XLSX
try (Editor editor = new Editor("data.xlsx")) {
    SpreadsheetEditOptions editOptions = new SpreadsheetEditOptions();
    editOptions.setWorksheetIndex(0);
    EditableDocument htmlDoc = editor.edit(editOptions);

    String html = htmlDoc.getContent(); // send to UI editor

    SpreadsheetSaveOptions saveOptions = new SpreadsheetSaveOptions(SpreadsheetFormats.Xlsx);
    editor.save(htmlDoc, "data-updated.xlsx", saveOptions);
}

Cross-platform Node.js layer wrapping the Java engine for HTML-based editing of Office files.

• GroupDocs.Editor-for-Node.js-via-Java: NPM package and runnable samples for DOCX/XLSX/PPTX ↔ HTML flows.
  Repo: https://github.com/groupdocs-editor/GroupDocs.Editor-for-Node.js-via-Java

// Convert DOCX to HTML, edit in your UI, then save back to DOCX
const groupdocs = require('@groupdocs/groupdocs.editor');

async function run() {
  const editor = new groupdocs.Editor('Templates/Letter.docx');
  const editOptions = new groupdocs.WordProcessingEditOptions();
  const htmlDoc = await editor.edit(editOptions);

  const html = await htmlDoc.getContent(); // send to your WYSIWYG editor

  const saveOptions = new groupdocs.WordProcessingSaveOptions(groupdocs.WordProcessingFormats.Docx);
  await editor.save(htmlDoc, 'Reports/Letter-Edited.docx', saveOptions);
}

run().catch(console.error);

• Embed DOCX/XLSX/PPTX/PDF online editors in portals, CRMs, and ECMs without Office COM or third-party services.
• Generate editable templates for contracts, proposals, and SOWs, then save back to PDF or Office formats.
• Build collaboration and review tools with HTML-based editing while preserving fonts, styles, and pagination.
• Create data-driven spreadsheet editors for multi-worksheet workbooks with controlled sheet selection.
• Offer secure on-premise editing for regulated industries where data cannot leave your environment.

• 40+ editable formats: DOCX/DOTX/DOC/RTF/ODT, XLSX/XLSM/ODS/CSV/TSV, PPTX/PPSX/ODP, HTML/MHTML, TXT.
• WYSIWYG HTML editing: flow or paged Word modes, worksheet selection, slide region editing, and resource (CSS/images/fonts) extraction.
• Round-trip fidelity: preserve fonts, lists, tables, headers/footers, track changes, and document metadata on save.
• Flexible outputs: save back to DOCX, XLSX, PPTX, HTML, MHTML, or PDF with font embedding and resource bundling.
• Performance & scale: stream-based processing, partial worksheet loading, and configurable memory/resource handling.
• Cross-platform: .NET Framework/Core/6+ and Java SE/EE on Windows/Linux/macOS; works with your preferred WYSIWYG editors.

• .NET: Install-Package GroupDocs.Editor or dotnet add package GroupDocs.Editor
• Java: add com.groupdocs:groupdocs-editor from Maven Central.
• Clone samples:
  • .NET examples: git clone https://github.com/groupdocs-editor/GroupDocs.Editor-for-.NET
  • Java examples: git clone https://github.com/groupdocs-editor/GroupDocs.Editor-for-Java
• Request a temporary license for full-feature evaluation.
• Run example projects to see DOCX/XLSX/PPTX → HTML → DOCX/PDF editing flows.

• Documentation and tutorials: https://docs.groupdocs.com/editor/
• Free support forum: https://forum.groupdocs.com/c/editor
• Temporary license: https://purchase.groupdocs.com/temporary-license

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