Compress PDF

PDF compression reduces file size by optimizing images, removing redundant data, and re-encoding content. Our tool uses advanced algorithms to analyze your PDF and apply the most effective compression techniques. For images, we use intelligent re-encoding that maintains visual quality while significantly reducing file size. Text and vector elements are preserved at full quality since they don't contribute much to file size.

Our compression is designed to maintain document readability and visual quality. The "Recommended" setting provides an excellent balance - reducing file size by 40-60% with minimal quality loss. "Maximum Compression" reduces size by up to 90% but may show slight quality reduction in images. Text remains sharp and readable at all compression levels.

Absolutely! Our PDF compressor works entirely in your browser using client-side processing. Your files are never uploaded to any server - all compression happens locally on your device. This means your sensitive documents never leave your computer, ensuring complete privacy and security.

Low Compression: Best for documents where every detail matters (designs, photos). Reduces size by 20-30%.

Recommended: Ideal for most documents. Reduces size by 40-60% with excellent quality retention.

Maximum Compression: Best for email attachments and web uploads. Reduces size by up to 90%.

Since all processing happens in your browser, the main limitation is your device's memory. Most modern devices can handle PDFs up to 100MB. For very large files, we recommend splitting them first using our PDF Split tool, then compressing individual sections.

Some PDFs are already optimized and can't be compressed further. This usually happens with:

• PDFs that are mostly text with no images
• Previously compressed PDFs
• PDFs with vector graphics only
• Scanned PDFs at very low resolution

Try the "Maximum Compression" setting for best results with image-heavy documents.