Compress PDF Free — Reduce File Size Without Losing Quality

Reduce the size of your PDF files by up to 90% without noticeable quality degradation. Our free PDF compressor intelligently analyzes your document and optimizes images, fonts and metadata to produce the lightest possible file. Perfect for email attachments, administrative portals or long-term archives. 100% local processing — your files never leave your browser.

How to Compress Your PDF — Step by Step

1. Upload your PDF — Drag and drop your file or click to select it. Files up to several hundred MB are accepted.
2. Choose compression level — Select light (maximum quality), standard (balanced) or strong (smallest file size).
3. Start compression — Click Compress. Processing takes a few seconds even for large files.
4. Download your compressed PDF — The percentage of size reduction is displayed clearly.

Frequently Asked Questions

Does compression damage the quality of my PDF?

With light or standard level, degradation is imperceptible to the naked eye. Our algorithm primarily targets unnecessary metadata and optimizes embedded images without distorting them.

Is there a maximum file size?

Our tool accepts PDF files up to 500MB with no subscription required.

Is my file secure during compression?

Absolutely. Compression is performed directly in your browser via WebAssembly: your file never leaves your device.

Privacy and Security

All compression processing is performed locally in your browser. Your PDF files are never sent, stored or analyzed on our servers. As soon as you close or refresh the page, all traces of the document are erased from the application memory.