Live free online PDF tool

Compress PDF online

Reduce PDF file size with light, recommended or strong compression modes. PDF Help is fast, free and privacy-conscious.

No sign-up for core toolsAutomatic deletionClean workflow
This first version optimizes PDF structure and streams when the backend engine is available. Image downsampling will be added later behind a separate option.
Compress PDF · 1-1 files · max 50 MB each

How to use this tool

  1. Choose files or drop them into the upload box.
  2. Review the options and start processing.
  3. Download the result before the temporary link expires.

Uploads and generated files are stored temporarily only. Temporary job and download URLs are not intended for indexing.

FAQ

Is Compress PDF free to use?

Yes. PDF Help is ad-funded and keeps core PDF tools free without requiring sign-up.

What happens to my files?

Files are uploaded for processing, stored temporarily, and automatically deleted after the short job expiry window.

Can I use it on mobile?

Yes. The upload flow and tool pages are designed for desktop and mobile browsers.