How to Compress PDF Files Online
Large PDF files can be a hassle to email or upload to websites. Our Free PDF Compressor helps you reduce file size significantly without compromising readability.
Secure
Files are processed in your browser. We never upload or store your documents.
Fast
Uses WebAssembly to compress files instantly without waiting for server uploads.
Flexible
Choose between maximum compression for size or high quality for printing.
Frequently Asked Questions
Will the quality of my PDF decrease?
It depends on the compression level. "Recommended" mode balances quality and size perfectly for screens. "Extreme" mode reduces quality noticeably but gives the smallest file size.
Is there a file size limit?
Since processing happens on your device, you can compress files as large as your device memory allows (usually up to 100MB+ smoothly).