About PDF Compressor
This free PDF compressor reduces the file size of any PDF directly in your browser without uploading it to any server. Upload your PDF, choose a compression level, and download the smaller file - useful when you need to email a large document, upload to a portal with a file size limit, or reduce storage usage.
PDF compression works by downsampling embedded images and removing unnecessary metadata. Text-only PDFs are already small and may not compress significantly. PDFs containing high-resolution photos, scanned pages, or large embedded graphics benefit most from compression and can typically be reduced by 50–80% with minimal visible quality loss.
This tool offers multiple quality presets - from light compression that preserves near-original quality to aggressive compression for the smallest possible file. Choose based on the intended use: documents for printing need higher quality than documents shared for digital review.
Your file never leaves your device. All compression is performed client-side in the browser using JavaScript, which means no upload wait time, no server-imposed file size limit, and no privacy risk. Sensitive contracts, financial documents, and personnel files can be compressed safely.
If the compressed result is too large, try a more aggressive compression setting. If the quality is unacceptable, use a lighter setting. For PDFs where image quality is critical, consider compressing the images before creating the PDF using the Image Compressor tool on this site.