About OS Authority

Every tool on this site runs inside your web browser. When you choose a file, it is read and processed by code running on your phone, tablet or computer, not on our servers. The result is created on your device and saved directly from it.

We never receive your files, their names or their contents.

The tools are free to use and need no sign-up. There are no watermarks on your results and no limit on how many files you process.

The site is being translated into more languages. Each translation is written for native speakers and reviewed before it goes live, so some tools appear in English first.