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Compress PDF

Make a PDF smaller without lowering its quality. You'll see the size before and after.

Runs in this tab · nothing is uploaded

  1. Add a file
  2. Choose options
  3. Download the result
Goal

Add a file to start.

Your result will appear here

Images aren't recompressed and pages aren't turned into pictures, so already-compact PDFs may not get smaller.

What to expect

Images aren't recompressed and pages aren't turned into pictures, so already-compact PDFs may not get smaller.

Read the guide

Use it in your own code

The same engine is the OfficeIMO.Pdf package for .NET. Run it on a server, in a script, or in your app, without Microsoft Office.

dotnet add package OfficeIMO.Pdf

What happens to your file

OfficeIMO runs inside this browser tab as WebAssembly. Your file is read here, never uploaded, stored or logged. Close the tab and it's gone.

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Example source

Download source