What's New
Expanded .NET support and tighter rendering fidelity across CAD, Office, and design formats.
- .NET 8 Support: Doconut now runs natively on the latest .NET 8 platform, giving developers access to modern runtime features and performance gains.
- CAD Conversion Accuracy: DWG‑to‑PDF conversion resolves image export failures and preserves correct font direction, eliminating missing graphics and orientation errors.
- Excel Rendering Consistency: Fixed chart date scales and layout discrepancies ensure Excel worksheets render precisely as designed in images and PDFs.
- Image Format Performance: Optimized SVG rendering and faster WebP processing deliver clearer visuals and reduced load times.
- Word Conversion Compliance: Table spacing, shape alt‑text, and form‑field preservation are now correct, supporting PDF/UA compliance and document fidelity.
One viewer for the files your users already work with
Render business documents, spreadsheets, presentations, PDF files, CAD drawings, emails, and images directly inside your .NET applications.
- 33+ compatible formats across Office, PDF, CAD, email, and image workflows
- Built for browser-based viewing without desktop document software
- Explore every supported format and category on the Features page
Documents & PDF
Word processing and fixed-layout files
Spreadsheets
Tabular data and open spreadsheet formats
Presentations
Slides and deck-based content
CAD, Email & Images
Technical drawings, messages, and visuals
Trusted Across Industries & Applications
Doconut provides essential viewing capabilities for mission-critical .NET applications, including Document Management Systems, CRMs, Customer Portals, Legal Tech, E-Learning, HR & Recruitment, Healthcare Records, Engineering Drawings (CAD), Financial Reporting, and more.
- Document Management Systems (DMS)
- Customer Portals
- Legal Tech
- E-Learning Platforms
- HR & Recruitment
- Healthcare Records
- Engineering Drawings (CAD)
- Financial Reporting
🌍 Trusted by developers in 40+ countries
Elevate Your .NET Application with Professional Document Viewing
Document Viewer Library
A robust .NET document viewer supporting PDF, Office, and CAD formats with annotations, search, and printing built in.
PDF Viewer
Smooth and high-quality rendering for PDF files in ASP.NET and .NET Core apps with full search and interaction support.
Modify PDF Online
Annotate, highlight, and make PDFs searchable right inside your web app — no external tools required.
Built for Developers
Integrate with ASP.NET, MVC, Core or Blazor quickly and deploy on Windows, Docker, Azure or AWS with ease.
⚡ .NET Server-side Conversion
Convert documents directly inside your .NET apps
Process PDF, Word, Excel, PowerPoint, and images with precision and speed using Doconut's built-in Converter Plugin.
Convert PDF, Word, Excel, PowerPoint, CAD & images on the server — no Office installed, no external services.
Streamlined API designed for ASP.NET, .NET Core & Blazor apps.
Deliver consistent exports with predictable performance and simple deployment.
Empowering Teams Across the Globe
What Our Customers Say
“Doconut allowed us to show many types of documents within the web application we developed for one of our larger customers. This has increased the user friendliness and efficiency of the tool considerably. We were very satisfied with the quick responses of the Doconut support.”
J. Meij
Sr. Manager, KPMG Advisory Netherlands
Go Beyond Viewing: Powerful Extensions
Converter Plugin
Convert PDF, Word, Excel, PowerPoint & images directly inside your .NET app.
Built for Enterprise
Controlled Printing
Manage print jobs directly from the viewer interface.
Secure & Scalable
Server-side processing keeps documents secure and scales effortlessly for enterprise workloads.
Frequently Asked Questions
Everything developers ask before integrating Doconut into a .NET app.
Add the Doconut NuGet package, register it with AddDoconut() and UseDoconut(), then open the PDF server-side with OpenDocumentAsync — the viewer widget streams the rendered pages straight to the browser, with no Office install or external software required.
Doconut natively renders 70+ file formats across 19 families — including PDF, DOCX, PPTX, XLSX, DWG, DXF, Visio, MSG, EML, PNG, JPG and DICOM medical images. See the full list on the Supported Formats page.
Yes. You can pass the password to the Viewer API, and Doconut will decrypt and render the document securely on the server side.
Yes — annotation (comments, highlights and drawings) and full-text search across text-bearing documents are built into the viewer.
On .NET 8, Doconut runs fully cross-platform — Windows, Linux, macOS and Docker (Azure, AWS and other clouds) — with no Office install required.
Embed the viewer widget in any ASP.NET Core page — Razor Pages, MVC views or Blazor. Register Doconut with AddDoconut() and UseDoconut(), then initialise the JavaScript widget where you want the viewer to appear.