What Leaves Your Device
Last updated:
We say the tools run in your browser and that nothing you type leaves your device. For the large majority of them that is literally true — the code does the work on your machine and never sends us what you enter. A handful of tools are different, because they physically cannot do their job without contacting a service. This page lists those exceptions in plain terms, so the claim on the home page is honest rather than absolute.
The short version
If a tool works on text, files, or numbers you provide — word tools, JSON and developer tools, calculators, converters, image, video, audio and PDF processing, the games — your input stays in your browser and is never uploaded. The exceptions below either send your input to a service (a photo, your voice, a hostname) or fetch live public data to show you. If a tool isn't listed as an exception, it runs entirely on your device.
Tools where your input leaves your device
These four send something you provide to a service, because the task can't be done inside a web page. Each one discloses this on its own page too.
| Tool | What’s sent, and where |
|---|---|
| Plant & Tree Identifier | The photo you choose is sent to Pl@ntNet’s identification API. Matching an image against millions of species can’t run in the browser. |
| VoiceFlow (voice dictation) | Your microphone audio is transcribed through the browser’s Web Speech API, which in Chrome and Edge sends the audio to the browser’s own cloud speech service — not to us, and not on-device. For sensitive material we recommend your operating system’s built-in dictation instead. |
| Ping / port check | The hostname and port you enter go to an LK Forge edge server, which makes the connection on your behalf. A web page can’t send the raw network packets a ping needs, so the check runs from the server instead. |
| What’s My IP & IP lookup | The lookup runs over the network by design: your public IP (and the geolocation of any IP you enter) is known to the network, not to the page, so the page asks a public IP/geolocation service for it. |
Tools that read live public data
These fetch public information to show you. They read from a feed — they don’t upload what you type. The only thing that leaves your device is the request itself (and, for weather, a location you choose).
- Weather — sends a location to fetch the forecast, alerts, and sun/moon times.
- Space (near-Earth asteroids, ISS tracker, night sky) — reads NASA and related public feeds.
- Earthquakes, volcanoes, wildfires — read USGS, Smithsonian GVP, and NASA FIRMS feeds.
- Currency converter — fetches the day’s public rate table once when the page loads, then converts every amount in your browser. Your numbers stay local.
Site analytics
Separate from any tool, the site itself uses privacy-conscious, aggregate analytics and standard security processing, described in our Privacy Policy. That is about which pages get visited, not the contents of what you type into a tool.
Questions or something we missed? Get in touch, or read the full Privacy Policy.