How to Compress PDF Without Uploading to a Server\n\nKeep your confidential files private by compressing locally.\n\n---\n\n## How It Works\n\niPDFDesign uses **WebAssembly** to run compression directly in your browser. Your files never leave your device.\n\n1. Open **[Compress PDF](/compress-pdf)**.\n2. Upload locally (file stays in browser memory).\n3. Select compression level.\n4. Download optimized file.\n\n---\n\n## Related Tools\n- [Compress PDF](/compress-pdf)\n- [Protect PDF](/protect-pdf)\n- [Merge PDF](/merge-pdf)