--- title: How to Convert HTML to PDF in C# (.NET 10 Guide) | daily.dev description: A practical guide to converting HTML into PDF invoices in C# using IronPDF on .NET 10, covering the ChromePdfRenderer setup, licensing, and the three ways to... canonical: https://daily.dev/posts/how-to-convert-html-to-pdf-in-c-net-10-guide--zhyfillpr twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How to Convert HTML to PDF in C# (.NET 10 Guide) | daily.dev og:description: A practical guide to converting HTML into PDF invoices in C# using IronPDF on .NET 10, covering the ChromePdfRenderer setup, licensing, and the three ways to... og:url: https://daily.dev/posts/how-to-convert-html-to-pdf-in-c-net-10-guide--zhyfillpr og:image: https://api.daily.dev/og/posts/zHyFILLPR.png og:image:alt: How to Convert HTML to PDF in C# (.NET 10 Guide) og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # How to Convert HTML to PDF in C# (.NET 10 Guide) **[Code with Mukesh](https://daily.dev/sources/codewithmukesh)** · [@iammukeshm](https://daily.dev/iammukeshm) · 31 min read · 20 upvotes · 2 comments ## Summary A practical guide to converting HTML into PDF invoices in C# using IronPDF on .NET 10, covering the ChromePdfRenderer setup, licensing, and the three ways to feed HTML into a renderer. The bulk of the piece focuses on CSS Paged Media problems that AI-drafted invoice templates miss: missing @page rules, rows splitting across page boundaries, ragged money columns, and a thead override that silently kills header repetition on page two. It also covers building a production-grade invoice endpoint with a bounded Channel and BackgroundService to avoid blocking the request thread, culture-aware currency formatting, and a comparison of HTML-to-PDF libraries, browser automation (Playwright), and programmatic builders (QuestPDF), plus how to wire IronPDF as an MCP tool for AI agents. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Why does my table header not repeat on every page when converting HTML to PDF with a Chromium renderer? The thead default already handles repetition, so adding thead { display: table-header-group } explicitly changes nothing in a Chromium-based renderer; verified by removing it and re-rendering a two-page invoice with the header still repeating. A broken header is almost always caused by something overriding that default, typically thead { display: block } inherited from responsive-table CSS, which also collapses the column widths. _Debugging print-CSS regressions like this is easier with daily.dev surfacing real fixes for HTML-to-PDF pagination bugs._ ### Why do my @page margin rules get ignored when rendering HTML to PDF with IronPDF? IronPDF's own renderer margin properties win over CSS @page margin rules by default, silently discarding a carefully written @page { margin: 18mm 14mm 24mm 14mm } rule. Setting CssPageRulePolicy to CssPageWin makes the CSS take precedence instead. This is one of the most common reasons developers report their print CSS being ignored with no visible cause. _Track gotchas like this before they cost an afternoon debugging PDF layout with daily.dev._ ### Should I let an AI model generate PDF documents directly at runtime instead of using a rendering library? No, because no language model performs an actual browser layout pass; a chat tool that appears to convert HTML to PDF is really writing code that calls a PDF library inside a hidden sandbox. This makes layout non-deterministic across identical documents, costs tokens and latency per render instead of a fixed cost, and risks pulling in unmaintained dependencies chosen by training-data frequency rather than by a developer. _Weighing AI-generated code against deterministic libraries is easier with daily.dev's coverage of real-world tradeoffs._ ## Community discussion Top comments from developers on daily.dev. **@pdfopsdev** · 0 upvotes > chromium-based renderers like IronPDF nail CSS paged media but you lose byte-for-byte reproducibility unless you strip creation dates and embed fonts explicitly, chromium's PDF writer stamps timestamps and font subsets differently run to run. worth knowing if you ever need to hash or diff invoices in CI. **@agustinbarrientos** · 0 upvotes > A golden PDF test should use a 46-line invoice, repeated headers, and an address that forces the totals onto a new page. ## Similar posts on daily.dev - [How to Build a Simple PDF Invoice Generator with PHP](https://daily.dev/posts/how-to-build-a-simple-pdf-invoice-generator-with-php-ogjkch3ct) · SitePoint · 1 upvotes · 4 comments - [PuppeteerSharp C\#: Export Chart.js Dashboards to PDF \(Guide\)](https://daily.dev/posts/puppeteersharp-c-export-chart-js-dashboards-to-pdf-guide--wxkfooplv) · C\# Corner · 2 upvotes · 0 comments - [Effortless Markdown to PDF Conversion in C\# Using .NET Word Library](https://daily.dev/posts/effortless-markdown-to-pdf-conversion-in-c-using-net-word-library-ohsqig5sm) · Syncfusion · 0 upvotes · 0 comments - [How to Convert PDF to HTML in JavaScript \(React Guide\)](https://daily.dev/posts/how-to-convert-pdf-to-html-in-javascript-react-guide--ocbrqgp5e) · Medium · 1 upvotes · 0 comments - [PDF Conversion Library for .NET: Easily Convert Word, Excel, PowerPoint, HTML, Images & XPS](https://daily.dev/posts/pdf-conversion-library-for-net-easily-convert-word-excel-powerpoint-html-images-xps-ojfrlmwcr) · Syncfusion · 5 upvotes · 0 comments --- Tags: [#.net](https://daily.dev/tags/.net), [#c#](https://daily.dev/tags/c#), [#aspnetcore](https://daily.dev/tags/aspnetcore) [View this post on daily.dev](https://daily.dev/posts/how-to-convert-html-to-pdf-in-c-net-10-guide--zhyfillpr) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"How to Convert HTML to PDF in C# (.NET 10 Guide)","url":"https://daily.dev/posts/how-to-convert-html-to-pdf-in-c-net-10-guide--zhyfillpr","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-to-convert-html-to-pdf-in-c-net-10-guide--zhyfillpr"},"datePublished":"2026-08-24T10:47:37.149Z","dateModified":"2026-09-14T09:00:42.939Z","description":"A practical guide to converting HTML into PDF invoices in C# using IronPDF on .NET 10, covering the ChromePdfRenderer setup, licensing, and the three ways to...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/766885e045b0d1d563e609ece1c554f3?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/766885e045b0d1d563e609ece1c554f3?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Code with Mukesh","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Person","name":"Mukesh Murugan","url":"https://daily.dev/iammukeshm","image":"https://lh3.googleusercontent.com/a-/AFdZucr2UBIpOeVTWohK8XKuXPOutNG6hgyQMz7CYj7LEA=s100","interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"EndorseAction"},"userInteractionCount":790}},"commentCount":2,"discussionUrl":"https://daily.dev/posts/how-to-convert-html-to-pdf-in-c-net-10-guide--zhyfillpr","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":20},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":2}],"keywords":".net,c#,aspnetcore","timeRequired":"PT31M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Code with Mukesh","item":"https://daily.dev/sources/codewithmukesh"},{"@type":"ListItem","position":3,"name":"How to Convert HTML to PDF in C# (.NET 10 Guide)"}]} {"@context":"https://schema.org","@type":"WebPage","@id":"https://daily.dev/posts/how-to-convert-html-to-pdf-in-c-net-10-guide--zhyfillpr","comment":[{"@type":"Comment","text":"chromium-based renderers like IronPDF nail CSS paged media but you lose byte-for-byte reproducibility unless you strip creation dates and embed fonts explicitly, chromium’s PDF writer stamps timestamps and font subsets differently run to run. worth knowing if you ever need to hash or diff invoices in CI.","datePublished":"2026-08-25T18:06:28.285Z","url":"https://daily.dev/posts/zHyFILLPR#c-cJHPZo4rl","author":{"@type":"Person","name":"PDFops","url":"https://daily.dev/pdfopsdev","image":"https://media.daily.dev/image/upload/s---8isRBKc--/f_auto/v1782922291/avatars/avatar_orjMeK8QKaaVZwGq7ScPz?_a=BAMAMicg0"}},{"@type":"Comment","text":"A golden PDF test should use a 46-line invoice, repeated headers, and an address that forces the totals onto a new page.","datePublished":"2026-08-26T02:47:52.378Z","url":"https://daily.dev/posts/zHyFILLPR#c-YewS39kzg","author":{"@type":"Person","name":"Agustin Barrientos","url":"https://daily.dev/agustinbarrientos","image":"https://media.daily.dev/image/upload/s--5ayxQnqn--/f_auto/v1788281802/avatars/avatar_wQYYVe5Tbj0NJ7C7qPoa8?_a=BAMAMicg0"}}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/how-to-convert-html-to-pdf-in-c-net-10-guide--zhyfillpr#faq","mainEntity":[{"@type":"Question","name":"Why does my table header not repeat on every page when converting HTML to PDF with a Chromium renderer?","acceptedAnswer":{"@type":"Answer","text":"The thead default already handles repetition, so adding thead { display: table-header-group } explicitly changes nothing in a Chromium-based renderer; verified by removing it and re-rendering a two-page invoice with the header still repeating. A broken header is almost always caused by something overriding that default, typically thead { display: block } inherited from responsive-table CSS, which also collapses the column widths. Debugging print-CSS regressions like this is easier with daily.dev surfacing real fixes for HTML-to-PDF pagination bugs."}},{"@type":"Question","name":"Why do my @page margin rules get ignored when rendering HTML to PDF with IronPDF?","acceptedAnswer":{"@type":"Answer","text":"IronPDF's own renderer margin properties win over CSS @page margin rules by default, silently discarding a carefully written @page { margin: 18mm 14mm 24mm 14mm } rule. Setting CssPageRulePolicy to CssPageWin makes the CSS take precedence instead. This is one of the most common reasons developers report their print CSS being ignored with no visible cause. Track gotchas like this before they cost an afternoon debugging PDF layout with daily.dev."}},{"@type":"Question","name":"Should I let an AI model generate PDF documents directly at runtime instead of using a rendering library?","acceptedAnswer":{"@type":"Answer","text":"No, because no language model performs an actual browser layout pass; a chat tool that appears to convert HTML to PDF is really writing code that calls a PDF library inside a hidden sandbox. This makes layout non-deterministic across identical documents, costs tokens and latency per render instead of a fixed cost, and risks pulling in unmaintained dependencies chosen by training-data frequency rather than by a developer. Weighing AI-generated code against deterministic libraries is easier with daily.dev's coverage of real-world tradeoffs."}}]} ```