Exis.PdfEditor

High-performance PDF text find/replace library for .NET. Operates directly on PDF content streams without converting to intermediate formats. Zero external dependencies.

Platform Compatibility (.NET Standard 2.0 Bridge)

This package ships two builds:

Build	Use with
netstandard2.0	.NET Framework 4.6.1+, .NET Core 2.0+, .NET 5, .NET 6, .NET 7
net8.0	.NET 8+ (optimized)

.NET Standard 2.0 acts as a bridge DLL — it is compatible with virtually every modern .NET runtime. NuGet automatically selects the correct build for your project. If your project targets .NET Framework 4.8, .NET Core 3.1, or .NET 6, the netstandard2.0 DLL is used. For .NET 8+ projects, the optimized net8.0 build is selected.

No additional configuration required. Just install the NuGet package:

dotnet add package Exis.PdfEditor

Or via the NuGet Package Manager in Visual Studio:

Install-Package Exis.PdfEditor

Features

• Direct PDF editing — no DOCX conversion, no format loss
• Preserves everything — form fields, checkboxes, digital signatures, layout
• Zero dependencies — no iTextSharp, no PDFsharp, no Aspose
• Width-aware replacement — automatically scales text to prevent overlap
• Regex support — find/replace with regular expressions, case-insensitive, whole-word
• Incremental updates — minimal file size changes
• Stream support — works with file paths or System.IO.Stream

Quick Start

using Exis.PdfEditor;
using Exis.PdfEditor.Licensing;

// Optional: activate with license key for documents over 3 pages
ExisLicense.Initialize("XXXX-XXXX-XXXX-XXXX");

// Find and replace text in a PDF
var result = PdfFindReplace.Execute(
    "input.pdf",
    "output.pdf",
    "old text",
    "new text");

Console.WriteLine($"Replaced {result.TotalReplacements} occurrences");