What is a PDF Compressor?

A PDF Compressor is a free online tool that reduces the file size of your PDF documents while maintaining readable quality. Large PDFs with high-resolution images, embedded fonts, and complex layouts can be several megabytes, making them difficult to email or upload. This compressor optimizes images, removes redundant data, and streamlines the file structure to significantly reduce size.

Why compress PDF files?

Many email services limit attachment sizes to 10-25MB. Cloud storage charges by the gigabyte. Large PDFs take longer to download and open on mobile devices. Compressing your PDFs by 50-80% makes them easier to share, faster to download, and cheaper to store — all while keeping the content perfectly readable. It is especially valuable for image-heavy documents like presentations, portfolios, and reports.

How to compress a PDF?

Upload your PDF file. Choose the compression level: Low (best quality, moderate reduction), Medium (balanced quality and size), or High (maximum reduction). The tool optimizes embedded images, removes metadata, and compresses the file structure. Compare the original and compressed file sizes before downloading. All processing happens in your browser for complete privacy.