Compress PDF — Reduce PDF File Size

Why compress a PDF?

Large PDFs are slow to email, hard to upload, and they fill up storage. Compressing shrinks the file size — often dramatically — so it sends in seconds and fits within attachment limits, while keeping the document readable. It is perfect for forms, portfolios, scans, and reports that started out too big.

How to compress a PDF

1. Open the compressor above.
2. Add the PDF you want to shrink.
3. Let the tool optimize images and content.
4. Download your smaller PDF.

Private by design

Compression happens in your browser, so your file is never uploaded to a server. Your documents stay on your device, the process is quick, and there are no watermarks or accounts.

Tips and related tools

Scanned PDFs usually shrink the most because their pages are images. If you only need part of a document, split the PDF first, then compress. To combine several compressed files, use Merge PDF.

Frequently asked questions

Is it free? Yes, compressing is free with no sign up.

Are my files uploaded? No. Everything runs in your browser.

Will quality drop? The tool balances size and clarity so text stays sharp; most documents look the same.

How much smaller will it be? It depends on the file, but image-heavy PDFs often shrink a lot.

Explore more on our free PDF tools page.

Tamer Baghdadi

CEO / Co-Founder