How it works
Most online utilities send your file to a server, do the work there, and send a result back. That is invisible from the outside: the page looks the same either way. It matters when the thing you pasted is an API key, a customer export, or a contract.
Nothing here works that way. Every tool on this site is JavaScript that your browser downloads once and then runs on your own machine. There is no server to receive your data, because the site is a folder of static files.
How the claim is enforced, not just stated
A privacy promise in a footer is worth very little. Three mechanisms make this one structural instead:
- Tool code cannot make network calls. The build rejects any use of
fetch,XMLHttpRequest,WebSocketornavigator.sendBeaconinside a tool. A tool that tried to transmit your input would fail to build. - The browser is told where the page may connect. Every page ships a Content Security Policy that names the only origins it is allowed to talk to. A compromised third-party dependency could not quietly send your data somewhere else, because the browser would block the attempt.
- Nothing is stored. No accounts, no database, no logs of what you paste. The only thing kept on your device is your light or dark theme preference.
What this rules out
Being honest about the trade: some genuinely useful tools are impossible under this constraint. Anything that needs to look something up — your IP address, a DNS record, a live exchange rate — requires a server by definition, so you will not find those here. That is a deliberate choice, not an oversight.
You can verify it
Open your browser's developer tools, switch to the Network tab, and use any tool on this site. You will see the page and its JavaScript load once, and nothing after that. You can also disconnect from the internet entirely — every tool keeps working.