How to compress pdf file with multiple page using .net c#?

Question

Hi, I need to compress pdf file with more than 5 page in project , how can i compress pdf in asp.net c# ? Please help. Thanks dastaan

Jignesh Kumar · Answer

Hi Dastan, Please use ItextSharp library to achieve this one, HTML " fileUpload " runat= "server" /> "btnCompress" Text= "Compress" runat= "server" OnClick= "CompressPdf" /> Button click event using iTextSharp.text; using iTextSharp.text.pdf; using System.IO; protected void CompressPdf ( object sender, EventArgs e) { if (fileUpload.HasFile) { if (fileUpload.PostedFile.ContentLength > 0) { string pdfFile = fileUpload.PostedFile.FileName; PdfReader reader = new PdfReader(pdfFile); PdfStamper stamper = new PdfStamper(reader, new FileStream(@ "C:\Users\dharmendra\Desktop\pdfCompressTest.pdf" , FileMode.Create), PdfWriter.VERSION_1_5); stamper.FormFlattening = true ; stamper.SetFullCompression(); stamper.Close(); } } }

Salman Beg · Answer

Check this link, https://www.c-sharpcorner.com/forums/what-is-the-best-way-to-compress-pdf-file-size https://stackoverflow.com/questions/13719553/compress-existing-pdf-using-c-sharp-programming-using-freeware-libraries

Kip Hackman · Answer

You can use LEADTOOLS PDF Pro SDK technology in your application. https://www.leadtools.com/sdk/products/pdf-pro You can leverage the PDFFile class coupled with the PDFOptimizerOptions to compress and optimize the PDF file to quickly and efficiently reduce the size while preserving as much of the original file's quality as possible. Here is some sample code: new PDFFile(srcPath) { OptimizerOptions = new PDFOptimizerOptions { AutoOptimizerMode = PDFAutoOptimizerMode.Customized, ColorImageDownsamplingMode = PDFDownsamplingMode.Bicubic, GrayImageDownsamplingMode = PDFDownsamplingMode.Bicubic, MonoImageDownsamplingMode = PDFDownsamplingMode.Bicubic, ColorImageDownsampleFactor = 2.0, GrayImageDownsampleFactor = 2.0, MonoImageDownsampleFactor = 2.0, ColorImageDPI = 150, GrayImageDPI = 150, MonoImageDPI = 150, ColorImageCompression = RasterImageFormat.Jpx, GrayImageCompression = RasterImageFormat.Jpeg, MonoImageCompression = RasterImageFormat.Jbig2, EmbedAllFonts = true , SubsetFonts = true } }.Optimize(dstPath);

Vishwakarma Vijay · Answer

Try this - https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Document-Operation/How-to-Compress-PDF-Document-in-C-VB.NET.html It allows you to compress images as well as other content in a PDF document in .NET.