Compress PDF Document | Blazor PDF library

Overview

The Syncfusion Essential PDF is a Blazor PDF library used to optimize or compress PDF documents. Reducing the PDF file size can help you optimize bandwidth cost, network transmission, and digital storage. It is especially useful in areas like archiving or long-term preservation, emailing, and using PDF documents in web-based applications. The Syncfusion .NET PDF library will work seamlessly regardless of the document structure and content to compress PDF with just a few lines of C# code. You can resize your files according to your requirement. Essential PDF provides the following ways of optimization:

Shrink or Compress Images

PDF files may contain many images. Removing the images from a PDF file is usually not an option as they are necessary for PDFs. Downsampling the images will decrease the number of pixels and is possibly the most effective way to reduce the PDF file size. Users can control the PDF file size with respect to the quality of the image.

Compress images in the PDF documentation

Optimize Fonts

Font resources will also result in large file sizes. To make the PDF smaller, remove unused glyphs and unwanted font tables from the embedded font in the PDF document.

Optimize fonts in the PDF documentation

Remove Annotations

Removing or flattening annotations can help reduce your file size. Flattening will remove annotations, but preserve its values. It will only be used when no further editing is needed.

Remove or flatten annotation from the PDF documentation

Optimize Page Content

Optimizing the page content will remove unwanted commented lines, white spaces, convert end-of-line characters to spaces, and compress all uncompressed contents.

Optimize page content in the PDF documentation

Disable Incremental Updates

The content of a PDF file can be updated incrementally without rewriting the entire file. Changes are appended to the end of the file, leaving its original content intact. Disabling the incremental update will rewrite the entire file, which results in a smaller PDF.

Disable incremental update in the PDF documentation

Remove Form Fields

Removing or flattening form fields can help reduce your file size. Flattening will remove the form fields and preserve its values. It will only be used when no further editing is needed.

Remove or flatten form fields from the PDF documentation

Remove Metadata

You can reduce the file size by removing the metadata in the PDF document.

Remove metadata from the PDF documentation

Compress PDF Code Example

Easily compressing PDF content using a few simple lines of C# code as demonstrated below. Also explore our Blazor PDF Example that shows how to create and modify PDF files from C# with 5 lines of code on different platforms.

c#
vb
using Syncfusion.Pdf;

//Create a new PDF document.
PdfDocument document = new PdfDocument();

//Set the compression level to best
document.Compression = PdfCompressionLevel.Best;

//Add a page to the document.
PdfPage page = document.Pages.Add();

//Create PDF graphics for the page.
PdfGraphics graphics = page.Graphics;

//Set the font.
PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 20);

string text = "Hello World!!!";
PdfTextElement textElement = new PdfTextElement(text, font);

PdfLayoutResult result = textElement.Draw(page, new RectangleF(0, 0, font.MeasureString(text).Width, page.GetClientSize().Height));

for (int i = 0; i < 1000; i++)
{
result = textElement.Draw(result.Page, new RectangleF(0, result.Bounds.Bottom +10, font.MeasureString(text).Width, page.GetClientSize().Height));
}

//Save the PDF document.
MemoryStream stream = new MemoryStream();
document.Save(stream);

//Close the PDF document. 
document.Close(true);
Imports Syncfusion.Pdf

'Create a new PDF document.
Dim document As New PdfDocument()

'Set the compression level to best
document.Compression = PdfCompressionLevel.Best

'Add a page to the document.
Dim page As PdfPage = document.Pages.Add()

'Create PDF graphics for the page.
Dim graphics As PdfGraphics = page.Graphics

'Set the font.
Dim font As PdfFont = New PdfStandardFont(PdfFontFamily.Helvetica, 20)

Dim text As String = "Hello World!!!"

Dim textElement As New PdfTextElement(text, font)

Dim result As PdfLayoutResult = textElement.Draw(page, New RectangleF(0, 0, font.MeasureString(text).Width, page.GetClientSize().Height))

For i As Integer = 0 To 999
result = textElement.Draw(result.Page, New RectangleF(0, result.Bounds.Bottom + 10, font.MeasureString(text).Width, page.GetClientSize().Height))
Next

'Save the document.
 Dim stream As MemoryStream = New MemoryStream()
document.Save(stream)

'Close the document.
document.Close(True)