1. IronPDF
2. How-Tos
3. Render Blazor Server to PDF

IronPDF on Blazor Server App (HTML to PDF Tutorial)

IronPDF is supported with .NET 6 and included projects types like Blazor. Using Visual Studio, you can add IronPDF to your Blazor Server App project and use it as demonstrated in the following example:

Create a new Blazor server project

Create a new Project and select the type blazor Server App

Install IronPDF into your Blazor project

After you have created the project, follow the next steps to install the IronPDF library from NuGet within Visual Studio.

1. In the Solution Explorer window in Visual Studio, right-click References and choose Manage NuGet Packages.
2. Select Browse and search for IronPdf.
3. Select the latest version of the package, check the checkbox for your project, and click install.

Alternatively,

Install-Package IronPdf

Add New Razor Component

Once IronPDF is installed in your Blazor project, start by adding a new Razor Component. For this tutorial we will name it "IronPdfComponent":

After that, update the code as following:

@page "/IronPdf" @inject IJSRuntime JS
<h3>IronPdfComponent</h3>
<EditForm Model="@_InputMsgModel" id="inputText">
    <div>
        <InputTextArea @bind-Value="@_InputMsgModel.HTML" rows="20" />
    </div>
    <div>
        <button onclick="@SubmitHTML">Render HTML</button>
    </div>
</EditForm>

@page "/IronPdf" @inject IJSRuntime JS
<h3>IronPdfComponent</h3>
<EditForm Model="@_InputMsgModel" id="inputText">
    <div>
        <InputTextArea @bind-Value="@_InputMsgModel.HTML" rows="20" />
    </div>
    <div>
        <button onclick="@SubmitHTML">Render HTML</button>
    </div>
</EditForm>

@code {

    InputHTMLModel _InputMsgModel = new InputHTMLModel();

    private async Task SubmitHTML()
    {
        IronPdf.License.LicenseKey = "IRONPDF-MYLICENSE-KEY-1EF01";
        var render = new IronPdf.ChromePdfRenderer();
        var doc = render.RenderHtmlAsPdf(_InputMsgModel.HTML);
        var fileName = "iron.pdf";
        using var streamRef = new DotNetStreamReference(stream: doc.Stream);
        await JS.InvokeVoidAsync("SubmitHTML", fileName, streamRef);
    }

    public class InputHTMLModel
    {
        public string HTML { get; set; } = "My new message";
    }
}

@code {

    InputHTMLModel _InputMsgModel = new InputHTMLModel();

    private async Task SubmitHTML()
    {
        IronPdf.License.LicenseKey = "IRONPDF-MYLICENSE-KEY-1EF01";
        var render = new IronPdf.ChromePdfRenderer();
        var doc = render.RenderHtmlAsPdf(_InputMsgModel.HTML);
        var fileName = "iron.pdf";
        using var streamRef = new DotNetStreamReference(stream: doc.Stream);
        await JS.InvokeVoidAsync("SubmitHTML", fileName, streamRef);
    }

    public class InputHTMLModel
    {
        public string HTML { get; set; } = "My new message";
    }
}

code
If True Then

	Dim _InputMsgModel As New InputHTMLModel()

'INSTANT VB TODO TASK: Local functions are not converted by Instant VB:
'	private async Task SubmitHTML()
'	{
'		IronPdf.License.LicenseKey = "IRONPDF-MYLICENSE-KEY-1EF01";
'		var render = New IronPdf.ChromePdfRenderer();
'		var doc = render.RenderHtmlAsPdf(_InputMsgModel.HTML);
'		var fileName = "iron.pdf";
'		var streamRef = New DotNetStreamReference(stream: doc.Stream);
'		await JS.InvokeVoidAsync("SubmitHTML", fileName, streamRef);
'	}

'INSTANT VB TODO TASK: Local functions are not converted by Instant VB:
'	public class InputHTMLModel
'	{
'		public string HTML
'		{
'			get;
'			set;
'		} = "My new message";
'	}
End If

Add this JavaScript code to _layout.cshtml to allow downloading of the PDF rendered by IronPDF in the Blazor Application.

<script>
    window.SubmitHTML = async (fileName, contentStreamReference) => {
        const arrayBuffer = await contentStreamReference.arrayBuffer();
        const blob = new Blob([arrayBuffer]);
        const url = URL.createObjectURL(blob);
        const anchorElement = document.createElement("a");
        anchorElement.href = url;
        anchorElement.download = fileName ?? "";
        anchorElement.click();
        anchorElement.remove();
        URL.revokeObjectURL(url);
    };
</script>

<script>
    window.SubmitHTML = async (fileName, contentStreamReference) => {
        const arrayBuffer = await contentStreamReference.arrayBuffer();
        const blob = new Blob([arrayBuffer]);
        const url = URL.createObjectURL(blob);
        const anchorElement = document.createElement("a");
        anchorElement.href = url;
        anchorElement.download = fileName ?? "";
        anchorElement.click();
        anchorElement.remove();
        URL.revokeObjectURL(url);
    };
</script>

Edit the NavMenu.razor file in the Shared folder to include a navigation tab to our new Razor component. Add the following code:

<div class="nav-item px-3">
    <NavLink class="nav-link" href="IronPdf">
        <span class="oi oi-list-rich" aria-hidden="true"></span> IronPdf
    </NavLink>
</div>

<div class="nav-item px-3">
    <NavLink class="nav-link" href="IronPdf">
        <span class="oi oi-list-rich" aria-hidden="true"></span> IronPdf
    </NavLink>
</div>

Once this has all been applied we can run our solution and you should see this: