1
Install
Copy the NuGet
command above - ready
in about 5 minutes.
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
NEWInstallStart Free TrialGo Live
2
Start Free Trial
Test in production without watermarks and 30 days fully
functional product. 24/5 technical support during trial
3
Go Live
See your PDF workflow
running in a live
production project.
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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.
.NET版本：
- C#, VB.NET, F# Languages
- .NET Core (10、9、8、7、6、5 和 3.1+)
- .NET Standard (2.0+)
- .NET Framework (4.6.2+)
作業系統和處理器：
- Windows (x64, x86)
- Mac (x64, ARM)
- Linux (x64)
.NET專案型別：
- 網頁 (Blazor & WebForms)
- 桌面 (WPF 和 MAUI)
- 控制台 (應用程式和程式庫)
應用程式環境：
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.
立即獲取您的30天試用金鑰。
編輯PDF
整理PDF
簽署和保護PDF
確保真實性
PDF表單管理
文件安全性
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 • 21M+ 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.
獲得全球數百萬工程師的信賴
每當開發者提出需求時，我們總會給出肯定的答覆！ 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
21M+次NuGet安裝，並持續加速中
21MillionNuGet下載
準備開始了嗎？
Nuget Downloads 21,105,021|版本：2026.9剛剛發布
IronPDF 是 IRONSUITE 的一部分
10 款適用於辦公室文件的 .NET API 產品
當您需要您的PDF看起來像HTML一樣快速。
