PDF Compressor
Reduce PDF file size with fine-grained quality control. Preview the output before downloading. All processing happens locally in your browser.
About This Tool
PDF Compressor reduces file size by re-rendering each page at your chosen quality and resolution. Five presets from Lossless to Maximum let you pick the right tradeoff, or use Custom mode to dial in exact JPEG quality (20-100%) and render DPI.
The side-by-side preview panel shows the original and compressed first page before you download, so you can see exactly how settings affect visual quality. The preview updates automatically as you adjust sliders.
All compression runs locally in your browser using PDF.js to render pages and jsPDF to rebuild the output PDF. Nothing is uploaded to any server and your documents stay entirely on your device.