About these developer tools
The validators check JSON, XML, CSV, YAML and TOML and report the first error they find, so you can fix a file before it breaks a build or an import. The formatters and minifiers change only spacing and layout, never what the code means.
The password, UUID and random string generators use your browser's cryptographic random number generator, and the password strength checker runs entirely in the browser, so what you type is never sent anywhere. Each tool page explains what the tool does, shows an example and answers common questions.