Compress PDF Files Online — Free
Reduce PDF file size while maintaining quality. Perfect for email attachments and web uploads.
Drop files here or click to browse
Supports: PDF files
Max: 100MB (free) · 2GB (Pro)
Secure Transfer
HTTPS encrypted uploads
Privacy First
Files auto-deleted after processing
No Registration
Start converting instantly
Works Everywhere
Any browser, any device
How to Convert
Upload your PDF file by dragging it into the upload area or clicking to browse.
Choose your compression level: Low (better quality), Medium, or High (smaller file).
Click Compress and download your optimized PDF file.
About PDF Compressor
PDF compression is essential for anyone working with document-heavy workflows. Large PDF files can be problematic when sharing via email, uploading to websites, or storing in cloud services with limited space. Our PDF compressor uses advanced algorithms to reduce file size by up to 90% while preserving text clarity and image quality.
The compression process works by optimizing embedded images, removing duplicate resources, and streamlining the internal document structure. Unlike simple downsampling tools, our compressor intelligently analyzes each PDF component to determine the optimal compression strategy. Text-heavy documents maintain their crisp readability, while image-laden files see the most dramatic size reductions.
Professional users rely on PDF compression for sending contracts, proposals, and reports via email without hitting attachment limits. Publishers use it to prepare web-optimized versions of catalogs and brochures. Students compress scanned documents and textbooks to save storage space. Government agencies and healthcare providers compress archived records while maintaining compliance with document retention requirements.
Our compression engine supports multiple quality presets to balance size reduction with visual fidelity. The "screen" preset creates the smallest files for web viewing, "ebook" provides a balance ideal for digital distribution, "printer" maintains quality suitable for home and office printing, and "prepress" preserves maximum quality for professional printing applications.
Common Use Cases
- •Reduce email attachment sizes to meet server limits (typically 10-25MB)
- •Optimize PDFs for faster website loading and better SEO performance
- •Compress scanned documents that tend to have unnecessarily large file sizes
- •Prepare documents for cloud storage to maximize available space
- •Create mobile-friendly versions of catalogs and brochures
How It Works
Our PDF compressor uses Ghostscript, the industry-standard PDF processing engine. It applies lossless compression to text and vector graphics while using intelligent lossy compression for embedded images. The process maintains PDF/A compliance and preserves document metadata, hyperlinks, and form fields.