How to Compress a PDF on Windows (All Methods)

Windows doesn't include a built-in PDF compressor in the same way macOS does, but there are several free methods that work well. Here's a complete guide to all of them.

Method 1: Microsoft Word

If you have Microsoft Office, you can open many PDFs in Word and re-export with image compression applied.

1. Open Microsoft Word.
2. Go to File → Open and select your PDF. Word will convert it — this works best for text-heavy PDFs.
3. Go to File → Save As and choose PDF as the format.
4. Click Options and under "Picture Quality", select a lower setting like "Low" or "Medium".
5. Save the file.

Method 2: Print to PDF (Built-in Windows Feature)

Windows 10 and 11 include a "Microsoft Print to PDF" feature that can sometimes reduce file size.

1. Open your PDF in any viewer (Edge, Adobe Reader, or a browser).
2. Press Ctrl+P to open the print dialog.
3. Select "Microsoft Print to PDF" as the printer.
4. Optionally adjust quality settings if available.
5. Print to a new PDF file.

This method's compression effectiveness is inconsistent and depends on the viewer you're using. It may not significantly reduce file size.

Method 3: Free Online Tool (Recommended)

For reliable, predictable compression with quality control, using an online tool is the most straightforward option on Windows.

1. Open compress-pdf.cc in Edge, Chrome, or Firefox.
2. Upload your PDF by dragging it in or clicking to select.
3. Pick your compression level and click Compress PDF.
4. Download the compressed file in seconds.

No software installation, no registration, and no cost. Works on Windows 10 and 11 with any modern browser.

Windows-Specific Tips

• If you use Google Chrome on Windows, you can also use Chrome's built-in print function (File → Print → Save as PDF) to produce slightly smaller PDFs — similar to the Print to PDF method above.
• For batch compression (multiple files at once), a free desktop tool like PDF24 Creator is available for Windows and supports folder-level compression.
• If you're on a work PC without admin rights, an online tool like compress-pdf.cc requires no installation and works within your browser.