PDF Compressor - Reduce PDF File Size
Compress PDF files online. 100% local processing - no upload, no server storage.
Click or drag and drop PDF file here
Maximum file size: 200MB | Supports up to 500 pages
📄 File:
📏 Original size:
📐 Total pages:
Compressing PDF...
Compression Complete!
Frequently Asked Questions
Is my PDF uploaded to your server?
No, absolutely not. Our PDF compressor works 100% locally in your browser. Your file never leaves your device, and we don't have any server-side processing. This ensures your documents remain completely private and secure.
How much can I compress a PDF?
Compression results vary depending on your PDF content. Typically, you can achieve 40-70% size reduction for image-heavy PDFs, and 20-40% for text-heavy PDFs[citation:10]. The compression level you choose affects both file size and quality.
What compression methods are used?
We use multiple techniques: image quality reduction (adjustable from 30-100%), font subsetting (only embed used characters), metadata removal, and image downsampling. All processing is done locally using pdf-lib[citation:10].
Will the quality be affected?
The quality impact depends on your compression settings. The "Low" compression setting preserves original quality while still reducing file size. "High" compression reduces quality more but yields smaller files. We recommend starting with "Medium" for the best balance[citation:10].
What happens to my files after compression?
Your files are processed in real-time in your browser and are automatically cleared when you close the page. We don't store, collect, or have access to any of your documents.
Is this tool really free?
Yes, completely free! There are no hidden fees, no premium tiers, and no watermarks. We believe PDF tools should be accessible to everyone.