Compress PDF File Size in C#

Aspose.PDF Product Family
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1

Hi support
i am struggling to compress a pdf.
i am using various options such as PdfPageEditor.Optimize(), .OptimizeResources(), .RemoveUnusedObjects = True, .UnembedFonts = True etc.
however, if i go to https://pdfcompressor.com/ and upload my pdf, they manage a 75% reduction in size.06S18E33.PDF (1.4 MB)
so the attached pdf goes from 1.4MB to 300KB.
is there anything in the toolkit to allow me to achieve the same?
thanks.

2

@gavinduffy

We used the below code snippet to compress your PDF document and achieved 668KB file:

var oo = new Aspose.Pdf.Optimization.OptimizationOptions();
oo.ImageCompressionOptions.ImageQuality = 20;
oo.ImageCompressionOptions.MaxResolution = 144;
oo.ImageCompressionOptions.ResizeImages = true;
oo.ImageCompressionOptions.CompressImages = true;
oo.ImageCompressionOptions.Version = Aspose.Pdf.Optimization.ImageCompressionVersion.Fast;
oo.RemoveUnusedObjects = true;
oo.RemoveUnusedStreams = true;
oo.LinkDuplcateStreams = true;
oo.SubsetFonts = true;
oo.AllowReusePageContent = true;
oo.UnembedFonts = true;

using (Document document = new Document(dataDir + "06S18E33.pdf"))
{
 document.OptimizeSize = true;
 document.OptimizeResources(oo);
 document.Save(dataDir + "output" + DateTime.Now.Millisecond + ".pdf");
}

output198.pdf (668.0 KB)

Would you please check the attached file and let us know in case it satisfies your requirements?

3

Hi Asad
the routine works well for smaller pdfs, however, it gives an error (Not supported image type) with a larger pdf, i will try to attach. (failed, file is 14MB, upload limit is 5)
all pdfs were created using the same system, so the error message is odd.

4

Hi Asad,

i just updated my aspose version, not a big update, but it is now working.
fingers crossed, 600,000 pdfs to go.
thanks for the code.

5

@gavinduffy

Please take your time to evaluate the API and feel free to let us know in case you face any issues.