Compress PDF Online - Reduce PDF File Size for Free
Reduce PDF file size by up to 80% without losing quality. Free online PDF compressor with no file limits.
How to Compress PDF Files Online
Upload PDF
Click the upload area and select the PDF file you want to compress.
Auto Compress
Our tool automatically optimizes your PDF for the best size-to-quality ratio.
Download
Click "Compress PDF" and your optimized file will download instantly.
PDF Compression FAQs
How much can I reduce my PDF file size?
Our compression tool can reduce PDF file sizes by up to 80% while maintaining good quality. The exact reduction depends on your original file content and quality settings.
Will compressing affect the quality of my PDF?
Our smart compression algorithm balances file size reduction with quality preservation. Most documents remain perfectly readable and professional-looking after compression.
What types of PDFs work best for compression?
PDFs with high-resolution images, scanned documents, and unoptimized files see the best compression results. Text-heavy PDFs are already optimized and may see smaller reductions.
Is PDF compression reversible?
No, compression is a one-way process. We recommend keeping a copy of your original file if you need the highest quality version later.
How long does compression take?
Most PDFs compress in seconds. Larger files may take a bit longer, but our tool is optimized for speed without sacrificing quality.
100% Secure
Files processed locally in your browser
Lightning Fast
Instant compression with no waiting
Quality Preserved
Smart compression maintains readability