Compress PDF

Compress PDF features

• 01

  Three clear presets

  Light keeps the most detail for printing, Medium is a sensible default for sharing, and Strong is for when you need to squeeze a PDF under an email or upload limit.

• 02

  Browser-only and private

  Your PDF is read, compressed, and saved entirely on your device. Nothing is uploaded to a server, queued, or stored — perfect for contracts, receipts, medical records, and scans.

• 03

  Works on any PDF

  Scans, photo-heavy reports, or multi-hundred page documents — Compress PDF re-renders every page so you always get a consistent, smaller output file.

Compress PDF FAQ

How much smaller can Compress PDF make my file?

It depends on the original. Photo-heavy PDFs and high-resolution scans often shrink by 60–90% on the Strong preset. Text-only PDFs that are already small may shrink less, since there is less to compress.

Is my PDF uploaded to a server?

No. The compressor runs entirely in your browser with JavaScript and WebAssembly. Your PDF is never uploaded, stored, or sent to a remote server.

Will compressing lose quality?

Some visible quality loss is unavoidable with lossy compression. Light keeps photos and text crisp for print, Medium is near-indistinguishable for on-screen use, and Strong is optimized for size rather than fidelity.

Why is text no longer selectable after compression?

Compress PDF re-renders each page as an image and rebuilds the PDF from those images. This is how it achieves strong size reductions, but the trade-off is that text becomes a picture instead of selectable characters.

Does Compress PDF work on Mac, Windows, and mobile?

Yes. It works in any modern browser on macOS, Windows, Linux, ChromeOS, iPhone, and Android. Larger PDFs may take a few seconds longer on mobile hardware.

Is there a file size limit?

There is no server limit because nothing is uploaded. The practical ceiling is your device's RAM — most phones handle 100+ page PDFs, and desktops can compress documents of several hundred MB.