If you need to compress large batches or require specific settings (like reducing image DPI), use the Foxit PDF Editor desktop application. You can use its 14-day free trial for these features. Quick Compression (Default Settings) Open your file in Foxit PDF Editor PDF Optimizer Reduce File Size Current File to apply default optimization. Advanced Optimization (Custom Settings) Compress PDF Files Online for Free: Reduce PDF Size | Foxit

You do not need to pay Adobe $15 a month or risk your bank statements on an unknown website. The way to compress PDF file size for free is clear: Foxit .

Foxit offers a trusted, lightweight ecosystem. Unlike many “free” online compressors that upload files to unknown servers (posing security risks), Foxit provides:

No confusing sliders or technical settings required. Simply open your PDF in Foxit, select "Optimize," and let the AI-driven algorithm determine the perfect balance of compression and quality for you.

"Print" the file to save a new, smaller version to your computer. Pro Tips for the Best Compression Results

Save the file as a new copy to ensure the original remains untouched. Comparison: Online vs. Desktop Editor Foxit Online Compressor Foxit PDF Editor (Trial) 14-Day Trial, then Paid Max File Size Unlimited (System dependant) Batch Processing Single files only Supports multiple files Fixed compression level Advanced custom settings Top Free Alternatives

Strip out bookmarks, links, and metadata that add unnecessary weight.