PDF Tools That Work Offline
IYONM is a progressive web app. After your first visit it keeps working with no internet connection, so you can merge, compress, convert, and edit PDFs on a plane, in a secure facility, or anywhere with no signal.
0 KB uploaded. Open your browser's Network tab while you use any IYONM tool and you will see zero data leave your device.
How offline works
Because every tool runs on your device, the only thing IYONM needs the network for is loading the page itself. We cache the app on your first visit, so after that the tools keep working with the network turned off.
Perfect for secure environments
Air-gapped or restricted networks often block file-upload sites entirely. IYONM has nothing to upload and can run with no connection at all, which makes it usable where cloud tools simply are not.
Install it like an app
On most browsers you can add IYONM to your home screen or desktop. It then opens in its own window and launches instantly, online or off.
Tools that run in your browser
FAQ
Do the tools really work with no internet?
Yes. After your first visit the app is cached, and since processing happens on your device, the tools keep working offline.
How do I install it?
Use your browser's 'Add to Home Screen' or 'Install app' option. It then runs in its own window.
Is anything uploaded when I am online?
No. Whether online or offline, your files are processed locally and never uploaded.