How to Compress PDF to Exact File Size?

Oversized PDF files often cause transmission issues. Here are 3 professional solutions for precise size control:

Method 1: Smart Online Compression Tool

Try PDFSail for intelligent processing:

  1. Upload document to the platform

  2. Select "Precision Mode"

  3. Set target size (MB/KB supported)

  4. Download optimized file

The AI-powered system automatically balances image quality and text clarity, ideal for email attachments and cloud storage.

Method 2: Adobe Acrobat Pro Method

  1. Go to "File › Save As Other › Optimized PDF"

  2. Adjust compression settings

  3. Use "Estimate Space Usage" for preview

Method 3: Built-in System Compression

For basic needs:

  1. Right-click file › Compress (Mac/Windows)

  2. Adjust resolution via Preview app

Pro Tips:

  • Maintain 150+ dpi for mixed-content documents

  • Use lossless compression for legal contracts

  • Avoid multiple compression cycles