Enterprise document conversion

Convert to and from PDF with 100+ file formats in .NET

Bidirectional PDF conversion for Office documents, images, HTML, emails, and CAD files. No external dependencies or internet access required. Preserves fonts, colors, images, and metadata with pixel-perfect fidelity in both directions.

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Bidirectional document conversion

Pixel-perfect fidelity

Preserves fonts, colors, images, layout, and metadata. No quality loss during conversion to or from PDF across 100+ file formats.

Zero external dependencies

Proprietary conversion engine runs offline without Microsoft Office, LibreOffice, or internet connectivity.

Universal format support

Convert between PDF and Office documents, images, HTML, emails, CAD files, and specialized formats with a unified API.

Advanced capabilities

Merge multiple formats, convert to PDF/A for archiving, render PDFs as images, and export PDFs to editable Office formats.

Comprehensive conversion capabilities

Office to PDF

Convert Word, Excel, and PowerPoint to PDF without Office installed.


  • DOCX, XLSX, PPTX and legacy DOC, XLS, PPT formats
  • Proprietary converter with no Office dependencies
  • Preserves formatting, fonts, and embedded content

Image to PDF

Transform 50+ image formats into high-quality PDF documents.


  • TIFF, JPEG, PNG, BMP, SVG, and camera RAW formats
  • Multipage TIFF support for scanned document batches
  • Quality preservation with configurable compression

HTML and web to PDF

Convert HTML files and live websites into PDFs with CSS support.


  • Chrome-based rendering for modern CSS and JavaScript
  • Configurable page size, margins, and orientation
  • Convert local HTML files or live URLs

PDF to editable Office

Convert PDFs to editable Word, Excel, and PowerPoint documents.


  • Hybrid AI approach combines ML with heuristics
  • DOCX, XLSX, PPTX output, preserving structure
  • Works offline without internet connectivity

Merge and combine

Combine multiple documents and formats into single PDFs.


  • Mix different file types in one operation
  • Merge Word, images, PDFs, and text into one PDF
  • Configurable PDF/A conformance for archives

PDF-to-PDF/A archiving

Convert PDFs to archival standards for long-term preservation.


  • Support for PDF/A-1 through PDF/A-4 standards
  • Automatic vectorization and rasterization
  • Compliance for legal and regulatory requirements

100+ supported formats

Convert virtually any document, image, or specialized file format to PDF. Comprehensive format support eliminates the need for multiple conversion tools and third-party dependencies.

Office documents
Word Excel PowerPoint ODT RTF

Images and graphics
TIFF JPEG PNG BMP SVG 50+ more

Web and email
HTML MHTML MSG EML Markdown

Specialized
CAD/DXF Camera RAW PSD Text files


ADVANCED FEATURES

Complete conversion ecosystem

Export PDFs to images or Office formats, merge multiple document types, convert emails and CAD files, and create archival PDFs for regulatory compliance.

PDF to images

Render PDF pages as PNG, JPEG, TIFF, BMP, or SVG for thumbnails, previews, and image extraction.


PDF to Markdown

Extract structured content from PDFs to Markdown format for documentation workflows.


Email and CAD conversion

Convert MSG/EML emails and AutoCAD DXF technical drawings to PDF with full fidelity.


Batch processing

Convert thousands of documents with multithreaded processing for high-volume workflows.


Frequently asked questions

Do I need Microsoft Office installed to convert Office documents?

No. Our SDK uses a proprietary Office-to-PDF conversion engine that doesn’t require Microsoft Office, Office interop libraries, or any external dependencies. You can convert DOCX, XLSX, PPTX, and legacy DOC, XLS, and PPT files on servers without Office licenses. This eliminates licensing costs and deployment complexity while ensuring consistent conversion results across Windows and Linux environments.

What happens to fonts and formatting during conversion?

The SDK preserves fonts, colors, images, layout, and metadata with pixel-perfect fidelity. Embedded fonts remain embedded, system fonts are referenced correctly, and all visual elements maintain their original appearance. For PDF/A archival conversion, the SDK automatically embeds fonts to ensure long-term rendering consistency. Complex layouts, tables, graphics, and formatting translate accurately across all supported formats.

Can I convert HTML and websites with modern CSS and JavaScript?

Yes. HTML-to-PDF conversion uses Chrome-based rendering that supports modern CSS3, Flexbox, Grid, and JavaScript execution. You can convert local HTML files or live websites by URL. Configure page dimensions, margins, orientation, and CSS handling through API properties. The converter respects CSS page sizes, handles responsive layouts, and can force single-page output or allow natural page breaks based on your requirements.

How do I merge multiple documents into a single PDF?

Use the CombineToPDF method to merge multiple files in one operation. You can mix different file types – combine Word documents with images, PDFs, and text files into a single PDF. Specify the output PDF conformance level (standard PDF or PDF/A variants) for archival requirements. The SDK processes files in the order provided and preserves content from each source document sequentially in the merged output.

What PDF/A standards are supported for archiving?

The SDK supports all PDF/A standards: PDF/A-1a, PDF/A-1b, PDF/A-2a, PDF/A-2u, PDF/A-2b, PDF/A-3a, PDF/A-3u, PDF/A-3b, PDF/A-4, PDF/A-4e, and PDF/A-4f. Conversion automatically handles elements that don’t comply with archival standards through vectorization or rasterization, as needed. You control the conversion approach through API parameters. PDF/A conversion is essential for legal documents, financial records, and any content requiring long-term preservation with guaranteed future renderability.

Can I convert PDFs back to editable Office formats?

Yes. The SDK converts PDFs and 100+ other formats to editable DOCX, XLSX, or PPTX files using a hybrid adaptive approach that combines machine learning with heuristics and mathematics. The conversion works entirely offline without internet access. While results depend on source document complexity, the technology produces editable output that preserves structure, formatting, and content. This is ideal for document editing workflows where source files aren’t available.

How does image-to-PDF conversion handle quality?

Image-to-PDF conversion preserves original image quality by default. You control compression settings through API parameters to balance quality against file size. The SDK handles 50+ image formats, including TIFF (with multipage support), JPEG, PNG, BMP, SVG, PSD, and even camera RAW formats from 50+ camera models. Images maintain their resolution, color space, and transparency during conversion. For scanned documents, pair with OCR capabilities to create searchable PDFs.

Can I render PDF pages as images for thumbnails or previews?

Yes. The SDK renders PDF pages to 10+ image formats, including PNG, JPEG, TIFF, BMP, and SVG. This is perfect for generating document thumbnails, creating image previews, or extracting visual content from PDFs. Configure output resolution, quality, and format through API parameters. You can render individual pages or batch-process entire documents. SVG output creates scalable vector graphics suitable for web display at any size.

What performance can I expect for batch conversion?

Conversion performance depends on file complexity, format, and hardware, but typical documents convert in 1–3 seconds. The SDK supports multithreaded processing for batch operations, allowing you to convert multiple documents in parallel. For high-volume scenarios, distribute workload across multiple servers or containers. The SDK has no per-document conversion limits, so you can scale horizontally as needed. Monitor memory usage for very large files and adjust batch sizes accordingly.

How do I handle email conversions with attachments?

Email-to-PDF conversion supports MSG and EML formats with full Unicode and mixed encoding handling. The converter preserves email formatting, headers, and body content. You can embed email attachments as PDF attachment annotations, making them accessible within the resulting PDF. The SDK handles right-to-left and left-to-right text for international emails and requires no external dependencies like Microsoft Outlook. Configure page size, margins, and layout through API properties.

Can the SDK convert specialized formats like CAD files?

Yes. The SDK converts AutoCAD DXF files to PDF with a one-step operation that preserves technical drawing geometry and layers. Beyond CAD, the SDK handles 100+ file types, including camera RAW formats from Canon, Nikon, Sony, and 50+ other camera manufacturers. This comprehensive format support eliminates the need for multiple conversion tools and ensures consistent output quality across diverse document types. All conversions use the same unified API for simplified development.

What licensing model does the conversion SDK use?

The SDK uses per-server licensing based on the number of servers or containers running the software, not per conversion or per user. A single license allows unlimited document conversions on that server. Volume discounts are available for multi-server deployments. Licensing covers development, staging, and production environments. Start with a free trial that includes full conversion capabilities to evaluate performance and quality in your environment before purchasing.