Compress PDF

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PDF too big to email or slow to upload? This free Compress PDF tool slims it down. Upload the file, click Compress, and download a smaller PDF that still looks clean. A lifesaver for big files:

  • Shrink a file to clear an email limit
  • Speed up uploads of heavy scans
  • Reduce storage for archived documents
  • Make a portfolio quicker to share

A Quick Word on IronPDF

IronPDF is the C# PDF library trusted by thousands of .NET developers in production. It compresses embedded images and optimizes file size from code, cutting bulk while keeping documents readable.

using IronPdf;
var pdf = PdfDocument.FromFile("large.pdf");
pdf.CompressImages(60);
pdf.SaveAs("compressed.pdf");
using IronPdf;
var pdf = PdfDocument.FromFile("large.pdf");
pdf.CompressImages(60);
pdf.SaveAs("compressed.pdf");
Imports IronPdf

Dim pdf = PdfDocument.FromFile("large.pdf")
pdf.CompressImages(60)
pdf.SaveAs("compressed.pdf")
$vbLabelText   $csharpLabel

See it in C#: PDF compression guide

Free and Built for Everyday Use

This tool is completely free and made for quick, practical use, no signup, no limits, no catch. Built with love by IronPDF.

Need More Than PDFs?

When the project grows beyond PDF work, the Iron Suite bundles ten .NET libraries into a single license: IronOCR for reading text from images in 125 languages, IronBarcode for generating and scanning codes, plus IronXL, IronWord, IronPPT, and more. Start your 30-day Iron Suite trial key today, no credit card required.