PDF Compressor

Reduce PDF file size online for free. Re-saves the PDF with optimized internal structure using pdf-lib — all processing happens in your browser.

How it works: This tool re-serializes your PDF with pdf-lib, which removes duplicate objects and unused resources. For PDFs with large embedded images, the size reduction will be modest — true image resampling requires a server-side tool.

Click to upload a PDF or drag & drop here