Sign OfficiallyOptimize
Compress PDF
Make a PDF smaller for email and uploads.
Runs on your device. Your file is never uploaded.Choose a file or drop it here
Your file stays on this device.
How to compress pdf
- Add a PDF.
- Choose Standard (keeps text selectable) or Strong (smallest file, pages become images).
- Compare sizes and download.
Questions
Is my file uploaded?
No. This tool runs inside your browser with code loaded from signofficially.com. Your file is read, changed and saved on your own device. Open your browser's developer tools, choose the Network tab and use the tool: no file leaves your computer.
Why is Strong compression so much smaller?
Strong turns each page into a compressed image. The file gets much smaller, but text can no longer be selected or searched. Use Standard when that matters.
How do I get under a size limit, like 100 KB?
Use Strong and lower the quality until the result is under your limit. The new size is shown before you download.
Is it free?
Yes. Every on-device tool is free to use, with no limits. Paid plans add unlimited signature requests, teams and more.