Compress PDF

Yes, PDF Hub is completely free with no limits, no registration and no software installation required. You can compress any PDF file directly in your browser at no cost.

Yes. All processing happens locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security for your documents.

The tool optimizes the internal structure of the PDF, removes unnecessary metadata and reorganizes the file's objects to reduce its size while preserving the readability of the content.

Compression preserves the original text, fonts and page structure. Visual quality is maintained in most cases. Choose 'Low' for the best quality or 'High' for the smallest file size.

Use 'Low' to preserve maximum quality with minor size reduction. 'Medium' offers a balanced trade-off between size and quality. 'High' provides the smallest file but may strip more metadata.

Yes. PDF Hub works on any modern browser including Chrome, Safari, Firefox and Edge on desktop, smartphone and tablet without any app installation required.

Since all processing happens in your browser, the limit depends on your device's memory. Most modern devices handle files up to several hundred MB without issues.

Password-protected PDF files cannot be compressed directly. You will need to remove the password protection first before compressing.