How to Compress PDF Online Free

Need to make a PDF file smaller? Whether you're trying to email a large document or upload it to a website, compressing your PDF online is the fastest solution.

Step 1: Open an Online PDF Compressor

Visit a free online PDF compressor like FreeConversion. The best tools process your files directly in your browser, meaning your documents stay private and never get uploaded to any server.

Step 2: Upload Your PDF File

Drag and drop your PDF file onto the compressor, or click to browse your files. You'll see information about your file including its current size and number of pages.

Step 3: Choose Compression Level

• Low compression — Minimal size reduction, best quality preservation
• Medium compression — Good balance between size and quality
• High compression — Significant size reduction, slight quality loss
• Maximum compression — Smallest possible file size

Step 4: Download Your Compressed PDF

Click "Compress" and wait a few seconds. You'll see exactly how much smaller your file is. Download the compressed version and you're done!

Tips for Better Results

• PDFs with large images compress the most — expect 50-80% reduction
• Text-heavy PDFs may only see 10-30% reduction
• For email attachments, use High or Maximum compression to get under 25MB