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The Complete .NET PDF Library —
Without the Free-Package Tax
Generate PDFs from HTML, then edit, merge, watermark, sign, and secure them — from one library, one API, one licence. No fluent layout code to hand-write, no AGPL obligations, no stitching together three free packages that were never meant to work as a set. Runs on .NET 10, 9, 8, Framework, Core, and Standard.
- One library for generate, edit, merge, watermark, sign, and secure — not three free packages bolted together
- Generate from HTML, CSS3, and JS with a Chromium engine — no fluent layout code to hand-write
- A commercial licence with no copyleft strings and 24/5 engineer support
- Free 30-day trial, no watermarks, no credit card
using IronPdf;
// One .NET library: generate, then edit, merge, and sign
var renderer = new ChromePdfRenderer();
PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Report</h1>");
PdfDocument cover = PdfDocument.FromFile("cover.pdf");
PdfDocument merged = PdfDocument.Merge(cover, pdf);
merged.SecuritySettings.OwnerPassword = "secret";
merged.SaveAs("final.pdf");
// No second package for the merge. No third for the password.
Imports IronPdf
' One .NET library: generate, then edit, merge, and sign
Dim renderer As New ChromePdfRenderer()
Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Report</h1>")
Dim cover As PdfDocument = PdfDocument.FromFile("cover.pdf")
Dim merged As PdfDocument = PdfDocument.Merge(cover, pdf)
merged.SecuritySettings.OwnerPassword = "secret"
merged.SaveAs("final.pdf")
' No second package for the merge. No third for the password.
PM >Install-Package IronPdf
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Cross Platform Support
The same single library runs identically on every supported platform — one dependency to test, deploy, and support, whether you ship to Windows, a Linux container, or a serverless function.
Designed for C#, F#, & VB.NET running on .NET 10, 9, 8, 7, 6, 5, Core, Standard, or Framework
Available for .NET, Java, Node.js, and Python.
Versions .NET :
- Langages: C#, VB.NET, F#
- .NET Core (10, 9, 8, 7, 6, 5, et 3.1+)
- .NET Standard (2.0+)
- .NET Framework (4.6.2+)
OS et processeurs :
- Windows (x64, x86)
- Mac (x64, ARM)
- Linux (x64)
Types de projets .NET :
- Web (Blazor & WebForms)
- Bureau (WPF & MAUI)
- Console (Application & Bibliothèque)
Environnements d'application :
IDE :
- Microsoft Visual Studio
- JetBrains Rider et ReSharper
Certification binaire
- Binaires signés DigiCert
A free PDF library is rarely one library
Building a real PDF feature on free packages usually means assembling a stack: one library to render your HTML, another to edit or merge the result, a third to handle signatures or encryption. Each brings its own API to learn, its own licence to check, and its own maintenance risk — and they were never designed to work together. Some ask you to rebuild layout in C# by hand; some ship under copyleft licences that reach into your own source; some stopped being maintained years ago. IronPDF is one supported library that generates, edits, merges, signs, and secures behind a single clean .NET API, with a commercial licence and an engineer on the other end of the ticket.
Obtenez votre clé d'essai 30 jours gratuitement.
Créer des PDFs
Concevoir des PDFs parfaits
- Créer un PDF vierge
- Ajouter des textes et des images
- Ajouter des formes
- Ajouter des en-têtes/pieds de page
- Ajouter des numéros de page
Personnalisation complète des PDFs
Conformité aux normes
- Versions PDF (1.2 - 1.7)
- PDF/UA (PDF/UA-1)
- PDF/A (1-3 b/a)
Visualisation et impression de PDFs
Convertir des PDFs
Conversion PDF polyvalente
Page web dynamique vers PDFs
Accessibilité Web
Conversion PDF sur mesure
Affiner la disposition du PDF
Modifier des PDFs
Modifier les objets PDF
Modifier le texte du document
Améliorer le design des PDFs
Organiser des PDFs
Modifier la structure des PDFs
Organisation supplémentaire
Signer et sécuriser des PDFs
Assurer l'authenticité
- Signatures numériques (.pfx, .p12)
- Modifier et signer l'historique des révisions
- Modifier métadonnées PDF
- Edit & Sign Revision History
- Edit PDF Metadata
Gestion des Formulaires PDF
- Créer des formulaires PDF
- Remplir et modifier les formulaires existants
- Aplatir les champs de formulaire
Sécurité du Document
Autres
Support des ressources Web
Performance et Compression
Why IronPDF?
One library, one licence, one support desk — instead of a stack of free packages you assemble and maintain yourself.
Pixel-perfect rendering
- Chromium-grade HTML/CSS/JS ➝ what you see in the browser is what’s in the PDF.
- Fonts, SVGs, image, complex layouts - consistent across environment.
- Handles header/footers, page number, margins, and pagination edge cases.
Up & running in 5 mins
- and one dependency covers generate, edit, merge, watermark, sign, and secure
- No second package to add, no third licence to reconcile, no glue code between libraries that disagree.
- Instant licence key, full API access, and a commercial licence with no copyleft strings attached.
Cross-platform
- .NET 10, 9, 8 LTS, Framework 4.62+
- OS: Windows, Linux, macOS.
- Cloud/containers: Azure, AWS, Docker/Kubernetes, serverless.
Great documentation
- Copy-paste your first PDF
- Task-based examples for HTML ➝ PDF, merge/split, stamping, forms, signing.
- Troubleshooting for fonts, page breaks, headless/ cloud deploys.
Perpetual license & 24/5 support
- Perpetual license - buy once, use forever. Optional updates and renewals.
- 24/5 engineer support (24/7 in Premium) Real humans, median chat response <1 min
- 30-day money-back guarantee Not the right fit? Full refund, no questions.
For builders
- Features you'll actually use:
- merge/split
- TOC/bookmarks
- headers/footers/margins
- watermarks/stamps
- forms (fill/extract)
- attachments
- images
- permissions
- compressing
- digital signing
- Works everywhere: Windows, Linux, macOS, Docker, Azure, AWS, cloud.
For buyers
- Trusted by 2M+ engineers • 20M+ NuGet installs.
- Teams report 40% dev-time saved vs DIY/OSS wrappers.
- Redistribution/SaaS options available.
- Procurement-friendly: perpetual license, optional renewals, invoice available, multiple payment options (including local).
- 30-day money-back guarantee.
Ce que disent nos clients à propos de IronPDF ?
40%ÉCONOMIE
Là où auparavant nous devions utiliser un plug-in ou un package pour l'OCR, et un autre pour le PDF, avoir tout intégré dans un package économique était vraiment génial pour nous.
David JonesIngénieur logiciel principalLire l'étude de cas
ÉCONOMIE20%
Green2view a réalisé 20% d'économies, une réduction de 30% du temps de traitement des documents, et 100% de conformité.
Lire l'étude de cas
MOINS DE TRAVAIL ADMINISTRATIF40%
Ça marche simplement—la génération automatisée de PDF fournit des rapports financiers parfaits à chaque fois.
Lire l'étude de casDes millions d'ingénieurs dans le monde entier lui font confiance
Chaque fois que les développeurs demandent, c'est un OUI ! de IronPDF
Does one IronPDF package cover generating, editing, merging, and signing, or do I need add-ons?ONE PACKAGE
Can I generate PDFs from HTML, CSS3, and JavaScript with browser-grade accuracy?YES!
Can I edit, merge, split, watermark, and encrypt existing PDFs with the same library?YES!
Will IronPDF's licence force me to open-source my application, the way AGPL libraries do?NO
Do I have to stitch together several free NuGet packages to get a full PDF workflow?NO
Is the library supported, with an engineer I can reach when something breaks?YES!
Can I render pixel-perfect PDFs from complex HTML5, CSS3, and JavaScript?YES!
Can I convert an HTML string to PDF in one line of C# code?YES!
Can I convert a URL to PDF with authentication, cookies, and custom headers?YES!
Can I generate a PDF from Razor, CSHTML, or ASPX views?YES!
Can I add custom headers, footers, page numbers, and watermarks during conversion?YES!
Can I run HTML to PDF conversion in Docker, Azure Functions, or AWS Lambda?YES!
Can I deploy my application using the library to Linux, macOS, or Windows, including Docker containers?YES!
Is the library thread-safe for use in highly concurrent, multi-threaded server applications and APIs?YES!
Can I set custom viewport dimensions and print media CSS to control responsive layouts?YES!
Is IronPDF compatible with Azure Functions?YES!
Can I permanently redact sensitive text and images from PDF documents?YES!
Can I generate a PDF from a URL that requires authentication via custom headers, cookies, or form logins?YES!
Can I access PDF DOM through ObjectModel property?YES!
Can I programmatically fill, read, and flatten interactive AcroForm?YES!
Does it support generating PDF/A and PDF/UA compliant documents for archiving and accessibility standards?YES!
Can I secure a document with 256-bit AES password encryption and set user permissions?YES!
Can I apply and verify digital signatures on a PDF using X.509 certificates?YES!
Can I test IronPDF in my live project for free now?YES! 
Click here to start your 30-day free trial
20M+ d'installations NuGet et ça ne fait qu'accélérer
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Nuget Downloads 20,809,720|Version :2026.9vient de sortir
IronPDF fait partie de IRONSUITE
10 API .NET pour vos documents
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Lorsque vous avez besoin que votre PDF ressemble à HTML, rapidement.
