How to use the Compress PDF
- Upload a PDF file
- Pick a compression level — stronger means a smaller file
- Download the compressed PDF
About this tool
Reduce PDF file size to meet email and upload limits. Pick a compression level and compare the before and after size. Compress PDF is part of ToolNest's collection of free pdf tools. All processing happens locally in your browser, so your files stay private and nothing is uploaded.
Frequently asked questions
Is the Compress PDF free to use?
Yes. Compress PDF on ToolNest is completely free, with no sign-up, no watermark and no daily limits.
Are my files uploaded to a server?
No. Compress PDF processes your files directly in your web browser on your own device. Your files are never uploaded, stored or seen by anyone, which makes it safe for private and confidential documents.
Is there a file size limit?
There is no fixed limit, but very large files depend on your device's memory and speed. Files up to a few hundred MB usually work well on a modern computer.
Does Compress PDF work on mobile phones?
Yes. ToolNest works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux. There is nothing to install.