Compress PDF Files Online
Reduce PDF file sizes for email attachments while preserving vector text and image quality. Zero uploads required.
Drop a PDF to compress, or click to browse
Fast client-side compression. Reduces document bloat without server queues.
How Client-Side PDF Compression Works
Most PDF documents contain redundant data: uncompressed text streams, orphaned revision histories, duplicate embedded fonts, and excessive metadata. PDF Toolkit Pro analyzes the PDF object table, rebuilds the cross-reference graph, and applies standard Flate/DEFLATE compression directly in browser memory.
Orphaned Object Stripping
When PDFs are edited over time, previous revisions linger silently inside the file. We strip unreachable objects completely.
Object Stream Compaction
Converts individual dictionary objects into unified compressed object streams supported by PDF 1.5+ readers.
Metadata Sanitation
Removes software telemetry tags and tracking metadata while retaining all visible content and typography.