Lossless
Optimizes PDF structure without changing image quality. Savings may be modest.
All PDF tools Local only
Compress toward a size, not a mystery.
Pick a quality level or enter the upload limit you need to hit. DocuChan builds the result privately and shows its exact size before you download.
Drop the PDF you want to make smallerLarge documents depend on this device; DocuChan stops before unsafe memory use.
Your PDF is never uploaded. Processing starts and ends inside this browser tab.
Choose the trade-off
Strong compression rebuilds pages as images
Searchable text, links, forms, accessibility tags, and digital signatures may not survive. Use Lossless when document structure matters.
Know the size before saving
This is generated locally from the actual result.