Compress PDF — Free Online PDF Tool

Shrink a PDF to a smaller file size while keeping it readable, with several quality levels. Free, no sign-up — files auto-deleted.

How to compress pdf

1. Open the Compress PDF tool and add your file — drag & drop or click to browse.
2. The PDF is recompressed at your chosen level to a smaller file.
3. Download your result instantly — nothing is stored.

Frequently asked questions

Will compressing lower the quality?

Pick a level: the “Recommended” balance suits most documents; higher levels keep more quality at a larger size.

Is it free?

Yes — every Genius tool is completely free, with no account, no watermark and no daily limits.

Are my files safe?

Files are sent over a secure HTTPS connection, processed, and automatically deleted right afterwards. Nothing is stored or shared.

Do I need to install anything?

No — it runs in your browser with no sign-up or software, and works on both phone and desktop.

Part of Genius Tools — a free suite of PDF, image and AI document tools.