PDF Compressor

## Compress PDF files in your browser Reduce a PDF file size locally — your document is never uploaded to a server. The tool re-encodes embedded images and strips redundant data so the file shrinks while the text stays sharp. ## How PDF compression works Most of a PDF size comes from embedded images, especially in scanned documents. Compression re-samples those images to a sensible resolution and quality and removes duplicated fonts and metadata. Vector text and line work are already compact, so they are preserved as-is. ## How much smaller Image-heavy or scanned PDFs commonly shrink by 50 to 80 percent. A text-only PDF is already small, so expect a modest reduction there. Choose a stronger setting for email and web, a lighter one when you want to preserve maximum image detail. ## When to compress Compress to get under an email attachment limit (many inboxes cap at 25 MB), to speed up uploads and page loads, or to save storage when archiving. To combine files first, use the [PDF merger](/tools/developer/pdf-merger); to split one apart, use the [PDF splitter](/tools/developer/pdf-splitter).