QemBox.Bundle
A package of .NET libraries for processing spreadsheets, documents, presentations, and emails.
Built for .NET developers
.NET libraries for processing documents, spreadsheets, emails, and images
Fast, efficient, and easy-to-use C# and VB.NET libraries for developing applications and services working with Microsoft Office, PDF, email and image file formats.
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MicrosoftSIEMENSDELLEYHITACHI
Product family
One toolkit for every business file format
Drop reliable document processing into desktop, web, cloud, and mobile .NET applications—with no Microsoft Office dependency.
QemBox.Spreadsheet
Read, write, convert, and print XLSX, XLS, XLSB, CSV, HTML, and ODS spreadsheets.
QemBox.Document
Read, write, convert, and print DOCX, DOC, PDF, RTF, HTML, MD, and ODT documents.
QemBox.Pdf
Read, write, edit, and print PDF files from your .NET applications and services.
QemBox.Presentation
Read, write, convert, and print PPTX, PPT, and PPSX presentations from .NET apps.
QemBox.Email
Process MSG, EML, MHTML, and MBOX files. Send and receive via POP, IMAP, SMTP, and EWS.
QemBox.Imaging
Read, convert, and transform PNG, JPEG, and GIF images from .NET applications.
QemBox.PdfViewer
Display, print, save, digitally sign and annotate PDFs in modern JavaScript web apps.
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Latest updates12 September 2026 12 September 2026 12 September 2026
News
Support for free text, hand drawing, and image annotations
QemBox.PdfViewer expands its modern browser annotation toolkit.
The internal rendering engine is now the default
Sharper, more dependable rendering across the QemBox .NET family.
QemBox.Spreadsheet 2026.9 released
New features, performance improvements, and fixes are now available.