Reduce PDF file size while maintaining quality.
Drop files here or browse
Accepts PDF · Max 100MB per file · Up to 5 files
Socera's free PDF compressor reduces large PDF files by up to 80% while preserving readability. Choose from four compression presets tailored for web sharing, email, digital reading, or high-quality printing. Unlike simple online converters, Socera gives you control over the compression level so you can balance file size against quality — essential for professional documents, presentations, and reports.
Drag and drop your PDF file or click to browse. Files up to 100 MB are supported.
Select from Web/Screen, Balanced, Print Quality, or High Fidelity presets depending on your needs.
Download your smaller PDF instantly. Most PDFs are reduced by 40–80% without visible quality loss.
Upload your PDF to Socera's Compress PDF tool, choose your compression level (Web, Balanced, Print, or High Fidelity), and download your smaller file. Most documents shrink 40–80% without noticeable quality loss.
It depends on the PDF content. Image-heavy PDFs typically shrink 60–80% on the Web/Screen setting. Text-only PDFs may only compress 10–30% since text already stores compactly.
Text in PDFs is vector-based and is unaffected by compression. Only embedded images are compressed. The Balanced and Print settings preserve image quality for normal use.
Web/Screen (smallest file, ideal for email and websites), Balanced (good quality for digital reading), Print Quality (sharp images for printing), High Fidelity (near-original quality with minimal reduction).
Yes, you can upload up to 5 PDF files for batch compression in a single session.
If your PDF is already optimized, or contains mostly text and vector graphics, further compression may be limited. PDFs with many embedded fonts may also resist compression.
Part of PDF Tools on Socera - free, private, no signup required.
