Format, convert, encode, inspect — in a page that does it on the clipboard rather than on a server.
15 tools · 12 free with no account · 3 free to try with one
Most developer utilities on the web are a text box that posts your input to somebody’s backend. That is fine for a lorem ipsum generator and not fine for a JWT, a config file or a customer export. These run entirely in the page.
No sign-up, no rate limit, and they keep working with the network off — the site installs as an app if you want it on a laptop that is sometimes on a train.
Not from the browser tools — open the network tab and watch. That is the point of them. The AI tools do send what you give them, and say so on the page.
Do these work offline?
Yes. The site is a progressive web app and each tool can be installed on its own; once a page has loaded it keeps working with no connection at all.
