How to Use PDF Compressor Online
Follow these simple steps to process your document with maximum privacy and speed:
Upload your PDF file from your device or drag and drop it into the upload box.
Select a compression preset or enter your custom Target File Size (e.g., 2.0 MB or 500 KB).
Optionally configure advanced image DPI, quality, and grayscale settings.
Click 'Compress PDF' to run our intelligent multi-pass compression algorithm.
Preview the compressed output and download your optimized PDF instantly.
Why Use PDFToolkit for PDF Compressor?
100% Privacy Guarantee
Your file is never uploaded to remote servers. The algorithm runs locally in your browser memory via WebAssembly.
Instant Processing
Skip long server queues and network bottlenecks. Documents are rendered and transformed at client-side hardware speeds.
Universal Compatibility
Works seamlessly on Google Chrome, Apple Safari, Firefox, and Microsoft Edge across Windows, macOS, Linux, and iOS.