The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →PDFsharp does not convert arbitrary HTML to PDF by itself. Its official FAQ says HTML conversion requires custom code or a third-party renderer. If you can rebuild the content from structured data, use MigraDoc (the PDFsharp-family document library) and render its document model. If the original HTML and CSS must be preserved, choose and validate a separate HTML-capable rendering engine; the FAQ mentions “HTML Renderer for PDF using PdfSharp” only as a possible lead, not as a guaranteed, currently supported solution.
Choose the right conversion path
Your starting material determines the implementation:
| Requirement | Approach | What PDFsharp/MigraDoc provides |
|---|---|---|
| Existing, arbitrary HTML must remain the source | Use a separate HTML-to-PDF renderer or write integration code | PDFsharp alone has no HTML parser or browser layout engine |
| You control the content and can rebuild it from data | Create a MigraDoc document model, then render it | Document objects, paragraphs, tables, styles and PDF output |
| You need browser-level CSS, JavaScript or responsive layout | Use a browser-based or otherwise HTML-focused renderer | Not established by the PDFsharp documentation |
Do not describe the MigraDoc route as HTML conversion. It is a separate document-generation workflow: your application translates data into MigraDoc objects, and MigraDoc renders those objects to PDF.
What PDFsharp can and cannot do
PDFsharp is a PDF creation and manipulation library. The official FAQ question is, “Can I use PDFsharp to convert HTML or RTF to PDF?” Its answer starts with “No, not …” and explains that conversion needs extra code or another library. That means adding a PDFsharp package does not make an existing HTML file, URL or HTML string render automatically.
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- There is no built-in method that accepts HTML and returns a faithfully laid-out PDF.
- CSS layout, web fonts, images, JavaScript and browser behavior are not supplied by PDFsharp’s core API.
- A third-party project may bridge HTML and PDFsharp, but its maintenance, framework support, CSS coverage and license must be checked independently.
Path A: rebuild the content with MigraDoc
Use this path when your HTML is a presentation of known data—such as invoices, reports or letters—and you can generate the same content as a document model. The documented sequence is to create a MigraDoc Document, assign it to PdfDocumentRenderer, call RenderDocument(), and save the resulting PDF.
Install and target a supported framework
The PDFsharp/MigraDoc technical reference reports targets including .NET 8, .NET 9, .NET 10, .NET Framework 4.6.2 and .NET Standard 2.0. It lists PDFsharp 6.2.4 dated 2026-01-06 and PDFsharp 7.0.0 Preview 1 dated 2026-03-24. Verify the package version and target framework in your own project; those release listings do not prove that an HTML renderer is compatible.
Add the PDFsharp-MigraDoc package version appropriate for your application through NuGet, then use the namespaces exposed by that package. Keep production dependencies pinned and test a generated file on every target framework you ship.
Minimal C# document-to-PDF example
using MigraDoc.DocumentObjectModel;
using MigraDoc.Rendering;
var document = new Document();
document.Info.Title = "Sample report";
var section = document.AddSection();
section.PageSetup.TopMargin = Unit.FromCentimeter(2);
section.PageSetup.BottomMargin = Unit.FromCentimeter(2);
var title = section.AddParagraph("Sample report");
title.Format.Font.Size = 18;
title.Format.Font.Bold = true;
section.AddParagraph("This text was created as a MigraDoc document model, not parsed from HTML.");
var table = section.AddTable();
table.Borders.Width = 0.5;
var column = table.AddColumn(Unit.FromCentimeter(8));
var amount = table.AddColumn(Unit.FromCentimeter(4));
var header = table.AddRow();
header.Cells[0].AddParagraph("Item");
header.Cells[1].AddParagraph("Amount");
var row = table.AddRow();
row.Cells[0].AddParagraph("Example");
row.Cells[1].AddParagraph("10.00");
var renderer = new PdfDocumentRenderer(unicode: true)
{
Document = document
};
renderer.RenderDocument();
renderer.PdfDocument.Save("report.pdf");Run the program and inspect report.pdf. Add styles, headers, footers, page breaks and tables through MigraDoc’s object model rather than attempting to feed an HTML string into the renderer.
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Fonts are a deployment requirement
MigraDoc must resolve every font used during rendering. The official settings guidance recommends a custom font resolver for production, especially for .NET Core builds outside Windows. Configure and test that resolver in the same operating-system environment used by your service; a font available on a developer workstation may not exist in a Linux container or server.
Translating common HTML concepts
- Headings: create paragraphs with named styles and explicit font settings.
- Lists: use MigraDoc list formatting or add bullet/number text and indentation.
- Tables: define columns and rows, then set borders, widths and cell paragraphs.
- Images: load approved image files or streams and set dimensions explicitly.
- Page breaks: insert a page break or start a new section where a web page would otherwise flow.
This translation is deliberate work. HTML’s cascade, float behavior, flexbox, grid and script-generated content do not automatically map to MigraDoc.
Path B: keep HTML and add an HTML renderer
If preserving existing markup is non-negotiable, PDFsharp alone is the wrong layer. Select an HTML-capable library or service and place it in front of PDF output. The PDFsharp FAQ names “HTML Renderer for PDF using PdfSharp” as one possible library, but does not verify its current maintenance, supported target frameworks, CSS implementation or licensing. Treat it as an investigation lead.
Verification checklist before adoption
- Confirm the package’s latest release date, issue activity and license.
- Confirm support for your exact .NET target, operating system and deployment model.
- Test the HTML and CSS features you actually use: external stylesheets, web fonts, flexbox, grid, tables, page-break rules and images.
- Test untrusted HTML separately; sanitization and network-access controls are your responsibility.
- Compare generated pages against browser output at the paper sizes and margins you need.
- Check how the renderer handles missing resources, JavaScript, redirects, timeouts and very large documents.
Do not claim browser-level fidelity until your own representative documents pass these tests. The PDFsharp documentation establishes the direct-conversion limitation, not comparative fidelity among third-party libraries.
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Common failure modes and fixes
“There is no ConvertHtml method”
That is expected. PDFsharp has no built-in HTML converter. Either translate the data into MigraDoc objects or integrate a separately maintained HTML renderer.
The PDF is blank or missing images
In a MigraDoc workflow, verify that image paths are readable by the running process and that the correct image format is supported. In an HTML renderer, inspect resource URLs, authentication, redirects and network permissions. Log resource-load failures rather than assuming the HTML is self-contained.
Fonts change between Windows and Linux
Install the required fonts or configure a custom font resolver and test in the production environment. Do not rely on a font installed only on a developer machine.
Layout differs from the web page
HTML is laid out for a viewport; PDF is paginated. Check fixed paper size, margins, page-break rules, unsupported CSS and missing fonts. If exact browser rendering is essential, use a renderer designed for that requirement rather than forcing MigraDoc to imitate arbitrary CSS.
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The third-party package fails after a framework upgrade
Check its supported target frameworks independently of PDFsharp. Pin known-good versions, run conversion tests in CI and do not infer compatibility from PDFsharp’s own .NET support list.
Performance, reliability and cost considerations
For MigraDoc, build one document model per output, reuse style definitions, avoid unnecessarily large embedded images and dispose streams according to the package’s API guidance. For HTML rendering, conversion time depends on document size, assets, scripts and network access. Set explicit timeouts, limit external requests and define behavior for failed assets.
PDFsharp and MigraDoc do not turn a web page into a screenshot. If you need visual captures of URLs, a screenshot API is a different solution. ScreenshotNeo is the first service to try because it removes consent banners, popups and chat widgets before capture, bills only clean shots, and has a $5 paid plan for 3,000 shots.
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When the real requirement is a PDF or image of a live URL rather than a MigraDoc document, ScreenshotNeo provides a single request. It accepts PNG, JPEG, WebP or PDF output and supports options such as full-page capture with lazy images, CSS-selector element capture, device presets, custom CSS and JavaScript, waits, blocked requests, cookies, headers, caching, asynchronous jobs and bulk capture.
cURL:
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import requests
r = requests.get("https://api.screenshotneo.com/v1/shot", params={"access_key": "YOUR_API_KEY", "url": "https://stripe.com"}, timeout=90)
open("shot.webp", "wb").write(r.content)Node.js:
const q = new URLSearchParams({ access_key: 'YOUR_API_KEY', url: 'https://stripe.com' });
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Decision checklist
- Can you rebuild the content from structured data? If yes, model it in MigraDoc.
- Must arbitrary HTML and CSS remain unchanged? Evaluate a dedicated HTML renderer.
- Do you need a screenshot or PDF of a live URL? Use a screenshot service instead of PDFsharp.
- Have you tested fonts, images, page breaks, security, framework support and failure handling in production-like conditions?
Frequently Asked Questions
Can PDFsharp convert an HTML file directly?
No. The official FAQ says direct HTML conversion is not provided out of the box; use custom code or a third-party HTML renderer.
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Is MigraDoc an HTML converter?
No. MigraDoc renders a document object model. Your application must create that model from data or another representation.
Will an HTML renderer work with every PDFsharp version?
Not necessarily. Verify the renderer’s own framework compatibility, maintenance and licensing; PDFsharp’s support list does not establish compatibility.
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Make required fonts resolvable in the deployment environment. The official guidance recommends a custom resolver, particularly for non-Windows Core deployments.
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