Get Modu Viewer

Pick the option for your device. Once installed, it opens any file, even offline.

Open the web app, then browser menu → Add to Home screen. It runs like an app and opens files offline.

Open files from KakaoTalk or email via Share → Modu Viewer. · Get the app (.apk)

Open the web app in Safari, then Share → Add to Home Screen.

Open the web app in Chrome or Edge, then Install from the address bar.

On any device, just open the link and view files right in the browser.

Every option is ad-free, account-free, and processes files on your device.