Compress PDF Online

Rewrite PDF structure using object streams locally. Compare the output size before downloading; already optimized files may not shrink.

Optimize PDF structure locally using object streams. This tool does not recompress images or offer compression levels, so size reduction is not guaranteed.

How to use

  1. Upload a PDF document.
  2. Click "Compress PDF" to rewrite the document using object streams.
  3. Review the reduction statistics and download your optimized PDF.

Frequently asked questions

How does client-side PDF compression work?

The tool rewrites PDF structure using object streams. It does not downsample images or offer compression levels. Already optimized PDFs may not shrink and may become larger.

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