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Sticraft
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Compress PDF Offline - Works Without Internet

Compress PDF with no internet connection: after your first visit the tool keeps working offline — on a plane, behind a firewall, or in a dead zone. 100% on-device processing, free.

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Local compression model

This tool rebuilds selected pages as compressed image pages. It works best for scanned and image-heavy PDFs. Text-heavy or already optimized PDFs may not shrink.

Upload a PDF and compress it locally to see the size report here.

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How to use

  1. Visit this page once while online so your browser caches the tool and its engine.
  2. Go offline — airplane mode included. Reopen the page: compress pdf loads from cache and runs locally.
  3. Process your PDF and download the result. No connection is used at any point.

Frequently Asked Questions

How can a web tool work offline?

Because nothing is processed on a server. A service worker caches the page and its WebAssembly engine on your first visit; afterwards both load straight from your device.

Do I need to install anything?

No install is required — one prior visit is enough. Optionally you can install Sticraft as an app (browser menu → "Install") for quicker offline access.