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Compress PDF

Reduce PDF file size while maintaining maximum quality.

Shrink heavy documents with smart image resampling and stream cleanup.

PDF

Select Your PDF Document

Drag and drop your file here, or tap to browse

Accepted formats: PDF

🔒 Private & Secure: Processing happens client-side in your browser. Nothing is uploaded to any server.

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Guide & Tutorial

How to Compress PDF Files Online — Reduce PDF Size Free

Large PDF files are slow to send by email, difficult to upload, and take up unnecessary storage. Free PDF Maker's Compress PDF tool reduces PDF file size online for free — no software required. Using smart image resampling and stream optimization, our compressor can shrink PDFs by up to 90% while maintaining readable quality.

Step-by-Step Guide

  1. 1

    Upload Your PDF File

    Select your PDF by clicking 'Select Your PDF Document' or dragging it into the upload box. Files up to 50 MB are supported.

  2. 2

    Choose Compression Level

    Select your preferred compression level: Less (high quality), Recommended (balanced), or Extreme (maximum compression). Most users get best results with 'Recommended'.

  3. 3

    Compress Your PDF

    Click 'Compress PDF Now →'. The tool resamples embedded images and optimizes internal document streams.

  4. 4

    Download Compressed PDF

    Once done, download your smaller PDF. The results panel shows the original size, new size, and percentage saved.

Frequently Asked Questions

How much can Free PDF Maker compress a PDF?

Depending on the content, you can reduce PDF size by 20% to 90%. Image-heavy PDFs compress the most. Text-only PDFs compress less.

Will compression reduce PDF quality?

At 'Less' and 'Recommended' levels, quality loss is minimal and not noticeable in normal use. 'Extreme' level reduces quality significantly for maximum size reduction.

Is there a file size limit?

Yes, files must be under 50 MB. For larger files, split them first using our Split PDF tool, then compress each part.

Can I compress a password-protected PDF?

No. You must first unlock the PDF using our Unlock PDF tool before compressing.

Is my PDF safe when compressing online?

Yes. All compression happens locally in your browser using JavaScript. No data is sent to any server.

Why Use Free PDF Maker?

  • Reduce PDF file size by up to 90%
  • Three compression levels for your needs
  • No quality loss at 'Less' and 'Recommended' settings
  • Completely free — no limits, no watermarks
  • 100% private — no server upload, runs in browser
  • Works on all PDFs including scanned documents

Ready to Compress PDF?

Stop struggling with oversized PDFs. Free PDF Maker's Compress PDF tool shrinks your documents in seconds, completely free and 100% private. Perfect for email attachments, uploads, and saving storage space.

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Compress PDF — Free PDF Maker: Stop struggling with oversized PDFs. Free PDF Maker's Compress PDF tool shrinks your documents in seconds, completely free and 100% private. Perfect for email attachments, uploads, and saving storage space.