Fast tools that respect your data.
devbelt is a hub of everyday developer utilities built on one principle: the work happens on your machine, not ours.
Nothing is uploaded
Every tool runs as JavaScript in your tab. Your data never touches a server — go offline and it still works.
No sign-up, no wait
Open a tool and use it. No accounts, no paywalls, no “verify your email” between you and a UUID.
Open source
The whole toolset is public. Audit the code, self-host it, or send a pull request for the tool you wish existed.
No trackers on tool data
Ads keep the lights on and are clearly walled off. We never log or sell what you paste into a tool.
You open a tool — the page and its logic load once, then cache.
You paste or type your input. It stays in the browser tab's memory.
The tool computes the result locally and shows it. No network request is made with your data.
No. Tool input lives only in your browser tab and is gone when you close it. We have no server that could receive it.
Unobtrusive display ads in clearly marked slots. That's it — no data resale, no premium gate on the tools.
Yes. The project is open source; clone it and run it on your own infrastructure or intranet.