OurPDF

Compress PDF

Reduce PDF file size by up to 70% while maintaining quality.

Runs in your browser · files never leave your device

How to use Compress PDF

  1. 1

    Choose your PDF (or drop it on the page).

  2. 2

    Pick a compression level.

  3. 3

    Download the result (several output files are offered as one ZIP).

  • 100% in your browser – no upload
  • Free, no sign-up, no watermark
  • Works offline once loaded
  • Part of 67 private PDF tools

Questions & answers

How much smaller will my PDF get?

Scanned and image-heavy PDFs often shrink by 50–80%. Text-only PDFs are usually already small; the tool tells you the real before/after size and never returns a bigger file.

Is Compress PDF free?

Yes, completely free with no limits on the number of files and no watermark.

Are my files uploaded to a server?

No. Everything runs in your browser on your own device. Your documents are processed locally and never leave your computer or phone.

Does Compress PDF work on mobile?

Yes. It works in any modern browser on Android, iPhone, Windows, macOS and Linux. Page Management tools also work offline after your first visit.

Reduce PDF file size by up to 70% while maintaining quality. OurPDF does this entirely inside your browser: nothing is uploaded, there is no account and no watermark.