Add it to the home screen
Landed here because the network dropped? Good: that's the product. Once a tool has loaded, it doesn't need me. Cached pages and encoders can still run on a file already on the device.
What wifi-off actually means
First visit still needs the network: HTML, CSS, JS, and whatever encoder that tool uses. Image tools are small. Video and audio pull about 30 MB of FFmpeg from this origin once. AI tools pull a model once. After that the service worker can keep those bytes.
I don't cache HTML aggressively (a homepage pointing at yesterday’s CSS is how deploys break). Fully offline with no prior visit, you may only see this page. If you've used a tool before, that install may still have the encoder.
Install it
Add to home screen / install as an app. That's a bookmark with a cache, not a native binary from an app store. Files still never leave the device.
Install the app
What still needs a network
- First load of a page you've never opened
- First load of FFmpeg, an image codec, or an AI model
- Analytics, if it runs (optional, not required for the tool)
Cutting wifi mid-conversion is fine. The file was never headed to the network.