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How to compress a PDF online

A quick guide to reduce PDF file size online while keeping documents readable for email, forms and work.

PDFPDF
Compression
Optimized
Compression in three stepsUpload the PDF, choose compression and download the lighter file.

When PDF compression helps

Compressing a PDF is useful when a file is too large for email, upload forms or shared workspaces.

Recommended workflow

Start with moderate compression, download the result and check that text and images remain readable.

  • Upload the PDF.
  • Choose compression.
  • Generate the optimized file.
  • Review the result before sending.

Frequently asked questions

Does PDF compression reduce quality?

It can reduce image quality. Start with moderate compression for a balanced result.

Can I compress a PDF on mobile?

Yes, but very large PDFs usually work better on desktop.

How to compress PDF online | MyToolWorks