Compress PDF - Free Online PDF Compressor

Compress PDF files online for free. Reduce PDF file size by downsampling page images and re-encoding them in the browser. Secure client-side processing — your files never leave your computer.

189 uses 100% client-side processing

Upload PDF File

Drag & drop one PDF file here

or click to browse

How to Compress

  1. 1 Upload your PDF file using the drop zone or button.
  2. 2 **Choose a quality level** to see the predicted file size reduction.
  3. 3 Click "Compress PDF" to start the client-side optimization.
  4. 4 Download the reduced file and view the size savings!

Features

  • Client-side processing for privacy and speed.
  • **Simulated Size Preview** before compression.
  • Multiple quality modes, including **Lossless** mode.
  • Optimized for PDFs containing large images.

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