How your files stay on your device

When you use a tool marked "stays on this device", your file or text is never sent to our servers. All the work happens inside your web browser, on your own computer or phone.

What happens when you use a tool

1. You choose a file or type some text. Your browser reads it into your device's memory.
2. The tool's code, which your browser downloaded when the page opened, processes it right there.
3. The result appears on screen, ready to copy or save to your device.

There is no server in the middle. Close the tab and everything is gone.

How we make sure of it

• Browser-enforced rules. Every page tells your browser which websites it may talk to: our own website only. Your browser blocks everything else, even if something went wrong in our code.
• No upload servers. Our website is a set of static files. For these tools there is no server-side program that could receive a file.
• No tracking of what you enter. We don’t collect usage statistics. If we ever do, they will be limited to anonymous counts, never your files or text.

Check it yourself

Open a tool, then turn off your Wi-Fi or mobile data and use it. Tools that run on your device keep working. You can also open your browser's developer tools, choose the Network tab, and watch: no request contains your file.

Tools that need the internet

A few tools, such as looking up a website's DNS records, cannot work without contacting another server. These are clearly labelled "needs an internet connection" and explain exactly what is sent.