Compress PDF - Reduce PDF File Size

Optimize PDF size instantly in your browser without any server upload.

100% Client-side Processing — All processing occurs entirely within your browser. Files are never uploaded to servers, ensuring complete privacy.

Drag & drop files here, or click to upload

Supported Format: .pdf (Max: 50MB)

How to Compress PDF

Upload File

Select or drag and drop your PDF file into the upload zone.

Select Strength

Choose from Low, Medium, or High compression levels based on your needs.

Compress & Download

Download your optimized file and check the saved disk space.

💡 PDF Compressor Expert Tips

Strength Guide

Use Low for printing, Medium for web sharing, and High for email attachments.

Image Optimization

Intelligently re-encodes images to achieve maximum compression with minimal quality impact.

Total Privacy

Sensitive documents are processed entirely in your browser, never leaving your device.

⚙️ How PDF Optimization Works

Image Re-encoding: High-resolution images within the document are intelligently downsampled and re-compressed as JPEGs to reduce size without visible quality loss.

Structural Compression: Merges object streams and removes unnecessary whitespace and metadata from the PDF's internal cross-reference table.

Recommended Tools