Compress PDF

Reduce the size of your PDF files while keeping the quality you need — choose between Low, Normal, and High compression levels.

Compress PDF Files Without Losing Quality

Use our free online tool to reduce PDF file size instantly. Choose your preferred compression level to get the best results for email, upload, or storage without sacrificing readability.

Why Compress a PDF?

How to Compress a PDF

  1. Upload your PDF file
  2. Select compression level: Low, Normal, or High
  3. Click Compress PDF
  4. Download your optimized PDF instantly

Compression Level Guide

Secure PDF Optimization

Your uploaded PDFs are protected with secure HTTPS and automatically deleted after processing. We don’t store your files or data.

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FAQs

Does this tool reduce quality?

Only in High compression mode. Low and Normal preserve most visual fidelity.

Is this tool free to use?

Yes — all ModifyPDF tools are free, without watermarks or limits.

What size limit is supported?

You can upload PDF files up to 50MB. Larger files may take more time to compress.