keeplocal.tools is the front page for a family of file tools built on one promise: your files never leave your device.
This page collects no personal data, requires no account, sets no cookies, and runs no analytics or third-party trackers. The only thing stored in your browser is a light/dark theme preference (in localStorage), which never leaves your device.
The tools themselves do their work entirely in your browser using WebAssembly — the files you open are read, processed, and handed back locally. They are never uploaded to a server, because there is no server to upload them to. Each tool is open source, so this is verifiable, not just a promise: read the code, watch the network tab, or unplug your connection and see it keep working.
Source for the tools lives at github.com/mtclab/localbench.
Questions? [email protected]