Why everything here runs in your browser

A note on how this site works and how you can check it. ← Workbench

Most online tools work the same way: you type or upload your data, it travels to a server somewhere, gets processed, and a result comes back. That design has real costs — the operator can log everything you send, the transfer takes time, and if their service goes down, your tool disappears with it.

Every tool on this site takes the other approach. Each page is a single HTML file with a bit of plain JavaScript inside. When you open it, your browser downloads the file once and then does all the computing on your own machine. If you hash a file, the file is read from your disk by your browser and never leaves it. If you convert a timestamp, the math happens on your CPU.

What that buys you

Privacy you can verify. "We respect your privacy" is a promise; a page that never sends your data anywhere is a mechanism. You don't have to trust the operator, because there is nothing to send.

Speed and offline use. Once the page has loaded, you can disconnect from the network entirely and keep using it. There is no round-trip to wait for, and no request queue on a busy day somewhere.

Longevity. A page with no backend keeps working as long as browsers can open HTML — which is measured in decades. Save the file to disk (Ctrl+S) and you have a copy that works forever.

How to check it yourself

You don't have to take my word for any of this:

Watch the network. Open your browser's developer tools (F12), switch to the Network tab, and use any tool on this site. After the page itself loads, no further requests appear — typing, pasting, dropping in a file, all silent.

Go offline. Load a tool page, then turn off Wi-Fi. Everything keeps working. A tool that needs a server cannot do that.

The honest limits

This approach is not free of trade-offs. Very large files are limited by the RAM on your device rather than a beefy server. Nothing is saved between visits — there is no account and no storage, which is the price of not being tracked. And a few things genuinely need a server (searching the web, sending email), so you won't find those here.

That's the whole deal: small tools that do one job, do it on your machine, and ask nothing in return.