Dependency injection
Add Doconut to the service container and receive the Viewer through the same DI model as the rest of your application.
Doconut for .NET 8
Document viewer SDK for .NET 8
Embed more than 70 formats in ASP.NET Core and Blazor, self-hosted on Windows or Docker.
- 76
- verified file extensions
- 19
- format families
- 2
- deployment targets
- 0
- external processing services
Built for an ASP.NET Core application boundary
Register Doconut once, inject the Viewer where documents are opened, and let middleware serve the viewer pipeline and embedded resources.
builder.Services.AddDoconut(options =>
{
options.LicensePath = "Doconut.Viewer.lic";
});
app.UseDoconutResources();
app.UseDoconut();
var token = await viewer.OpenDocumentAsync(filePath);Asynchronous document sessions
Open files with OpenDocumentAsync() and return an opaque server-side token to the browser viewer.
Middleware-owned resources
Serve scripts, styles, images, and document requests with UseDoconutResources() and UseDoconut().
Explicit plugin registration
Enable licensed capabilities such as Converter and DICOM in the same startup configuration as the base viewer.
70+ formats for business workflows
76 verified file extensions. One viewer.
The exact SDK catalog contains 76 viewable extensions across 19 families, including formats that PDF-only components leave behind.
Office and PDF
PDF, DOC, DOCX, RTF, ODT, XLS, XLSX, CSV, PPT, PPTX, ODP
CAD and diagrams
DWG, DXF, DGN, VSD, VSDX, VSSX, VSTX, MPP, MPX
Email and medical
EML, EMLX, MSG, DCM, IMA, XPS, EPUB, MHT, MHTML
Images and web
JPG, PNG, TIFF, SVG, WEBP, AVIF, PSD, HTML, TXT, and more
Deploy in environments we validate
The .NET 8 build supports self-hosted deployment on Windows and in Docker while keeping document processing inside your infrastructure.
- Run directly on Windows
- Package the application for Docker deployments
- Keep document processing inside infrastructure you control
- Use the normal single-instance path or opt into Distributed
Scale across application nodes when demand grows
Distributed mode publishes reusable document artifacts to shared storage so any authorized node can serve protected viewer requests.
Distributed mode is opt-in. The standard single-instance viewer remains the default.
No sticky sessions
Approved nodes validate shared access tickets instead of depending on one application instance.
Protected access
Tickets can bind document access to the current browser and authenticated user.
First-page priority
Begin viewing while optional background publishing continues with later pages.
Operational control
Use bounded queues, readiness markers, revocation, and retention for predictable deployments.
Questions from .NET teams
Can Doconut display Word, Excel, PowerPoint, and PDF in one viewer?
Yes. The .NET 8 catalog supports 76 file extensions across 19 families and displays them through one browser viewer.
Does Doconut require Microsoft Office?
No. Documents are rendered by the self-hosted Doconut SDK without installing Microsoft Office on the server or client.
Can I use Doconut with Blazor?
Yes. Open the document through the injected Viewer service, then initialize the Doconut JavaScript viewer inside your Blazor page.
Are documents sent to a third-party cloud?
No. Rendering and optional shared artifacts stay inside the infrastructure configured by your application.
Add multi-format viewing to your .NET 8 application
Test Doconut with your own PDF, Office, CAD, email, image, and medical files.