Frequently Asked Questions

Yes! All processing happens locally in your browser (using WebAssembly). Your files never leave your device, so you don't use any data to 'upload' them.

Yes. Once the page loads, you can go completely offline. The tools run entirely on your computer, so you can edit PDFs on a plane, train, or anywhere without Wi-Fi.

Absolutely. We operate on a 'Client-Side Only' architecture. This means your files are processed by your own computer's browser and are never uploaded to our servers. Your privacy is guaranteed by design.

Technically, the limit depends on your device's available memory (RAM), as the browser loads the file into memory. For most modern devices, files up to 100MB-200MB are handled easily.

Yes, PDF Tools is fully responsive and works great on mobile browsers (iOS and Android).

Our compression algorithm currently focuses on structural optimization (removing unused objects). If your PDF consists mostly of high-resolution scanned images, structural optimization might have limited effect. We are working on image downscaling for future updates.