Compress PDF
Compress PDF files in seconds. Reduce PDF file size while maintaining maximum quality. 100% secure browser-based compression — files never leave your device.
Drag & drop your PDF here
or click to browse files
Max file size: 100 MB
How to Compress PDF online for free
Upload your PDF file by dragging and dropping it or clicking the upload area.
Select your preferred compression level: Low (best quality), Medium (recommended), or High (maximum compression).
Click the 'Compress PDF' button to start the on-device processing.
Compare original and compressed sizes, then download your optimized PDF instantly.
Features of our Compress PDF tool
100% Privacy & Security
All processing occurs locally in your browser using WebAssembly. Your files never leave your computer.
Fast & Free
Instant processing with zero wait times. No subscriptions, limitations, or hidden costs.
No Installation Needed
Access PDFCraft from any modern browser on Windows, Mac, Linux, iOS, or Android.
High Fidelity
Our client-side rendering engines maintain high quality, formatting, and layout styles.
Frequently Asked Questions
How does local PDF compression work?▼
PDFCraft compresses files directly in your web browser using WebAssembly. Unlike other services, your document is never uploaded to external servers, protecting your privacy completely.
Does compressing a PDF reduce its visual quality?▼
It depends on the compression level. Medium compression reduces image resolution slightly while keeping text crystal clear. Low compression maintains maximum quality, while High compression optimizes for the absolute smallest file size.
Is there a file size limit for PDF compression?▼
Since compression runs locally on your computer or phone, there are no artificial server-side limits. It can handle large files easily, subject only to your device's available memory.