Compress PDF Free Online
Free PDF compressor — shrink any PDF directly in your browser with no upload required. Auto-detects compressed PDFs and can decompress them for re-editing.
Large PDFs — especially ones full of scanned pages or photos — can be awkward to email or upload to forms with size limits. This tool shrinks a PDF down while keeping the text sharp and readable, mainly by reducing the size of any images inside it. If the file is already compressed, it can be opened back up for editing and then compressed again when you're done. The whole process takes place on your device, so there's no waiting for an upload and download.
Frequently Asked Questions
How much can compression reduce file size?
Results vary by content, but image-heavy PDFs typically see the largest reductions.
Will compression reduce text quality?
No. Text and vector content remain sharp; compression primarily targets embedded images.
Can I decompress an already-compressed PDF?
Yes, DocTools Pro detects compressed PDFs and can decompress them for further editing.
Why would I want to make a PDF smaller?
Smaller PDFs are easier to email, upload to forms, or store, especially when there are file size limits.