[HttpGet] public IActionResult DownloadPdf() { string base64String = GetPdfFromSource(); // Fetch your string byte[] pdfBytes = Convert.FromBase64String(base64String); // Returns the file to the browser with the correct MIME type return File(pdfBytes, "application/pdf", "Invoice.pdf"); } Use code with caution. Method 3: Using Third-Party Libraries convert base64 to pdf and display in mvc - C# Corner
using System; using System.IO; string base64String = "JVBERi0xLjQKJ..."; // Your Base64 string here byte[] pdfBytes = Convert.FromBase64String(base64String); // Saves the file to the current directory File.WriteAllBytes("DownloadedFile.pdf", pdfBytes); Use code with caution. Method 2: Downloading via ASP.NET Core (Web)
: Use Convert.FromBase64String() to transform the string into a byte[] . download pdf from base64 string c#
Downloading a is a common task in modern application development, especially when dealing with document APIs, reporting services, or databases that store binary data as strings. This process involves decoding the Base64-encoded ASCII text back into its original binary form (a byte array) and then serving or saving that data as a .pdf file. How to Convert Base64 to PDF in C#
To save a PDF directly to a local path, the System.IO.File class provides a simple one-line method. Downloading a is a common task in modern
: Write the byte array to a file on disk or return it as a file stream in a web response. Method 1: Saving a PDF Locally (Console/Desktop)
: If your Base64 string includes a Data URI prefix (e.g., data:application/pdf;base64,... ), you must remove it before decoding. : Write the byte array to a file
The fundamental mechanism for this conversion in C# relies on the System.Convert class.