About DevToolsBox

What this is

DevToolsBox is a small collection of everyday developer utilities: formatting JSON, comparing two documents, decoding a token. The kind of thing you reach for a dozen times a week and want to finish in three seconds.

The aim is not to have the most tools. It is for the handful here to be fast, correct, and pleasant on a phone as well as a laptop.

Why it runs in your browser

Every tool on this site is implemented in JavaScript that runs on your machine. There is no backend, no database and no account system, so there is nothing to upload your data to even by accident.

That matters because these tools handle sensitive material: access tokens, API responses, configuration files. The safest way to handle them is not to receive them at all.

How it is paid for

The site is supported by advertising, not by charging for the tools or selling anything about the people who use them. The tools stay free and unlimited.