| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 5 | 3 |
| Spec score · PDF SDKs | 8.3 (#6) | 7.9 (#15) |
| Conversion | It converts HTML, URLs, Word documents, images, and other formats to PDF. | The vendor lists PDF conversions to Word, Excel, PowerPoint, images, HTML, Markdown, XPS, SVG, TIFF, PCL, PostScript, and PDF/A, and conversions from text, images, TIFF, XPS, SVG, and HTML to PDF. |
| Headquarters | The IronPDF brochure lists Iron Software at 205 N. Michigan Ave., Chicago, IL 60601, USA. | The vendor's contact page lists its address in Chengdu, Sichuan, China. |
| Integrations | The site lists Visual Studio, JetBrains Rider, ReSharper, and NuGet among the tools IronPDF works with. | The vendor says the library can be installed through NuGet or added to a .NET project by referencing the package DLL files. |
| Product | IronPDF is a C# PDF library for generating, editing, and securing PDFs in .NET. | Spire.PDF for .NET is a PDF API for creating, writing, editing, handling, and reading PDFs from .NET applications. |
| Support | The licensing page lists email support response targets of 48 hours for Plus, 24 hours for Professional, and 12 hours for Unlimited; enterprise licensing lists a 4-hour SLA. | The vendor provides free online technical resources, and listed paid-support licenses include one-on-one support from an expert and faster guaranteed response times. |