Small jobs like decoding a token, testing a pattern or writing a config file should not need a full setup. These utilities cover the daily chores of working with text and code.
Paste, inspect, copy. Decode a JWT, test a regular expression, compare two versions of a file, explain a cron schedule or query a JSON document with JSONPath, and get the result instantly with no account and no waiting.
Because processing happens in your browser, tokens, logs and configuration snippets are not uploaded. Even so, avoid pasting production secrets into any tool you have not reviewed, and rotate credentials that were exposed by accident.
The JWT decoder and JSONPath tester are often used back to back when debugging an API response, the regex tester and diff checker pair naturally when cleaning up log files, and the Docker Compose/Kubernetes and AWS IAM generators save time when scaffolding a new environment from scratch.