Tools
Small, self-contained developer utilities. Everything runs client-side — nothing you paste ever leaves your browser.
json/Paste ugly or escaped JSON and explore it as an interactive tree.regex/Test regular expressions against live text with match highlighting, capture groups, and a replace preview.jwt/Decode a JWT's header and claims, and flag alg:none or empty-key signing.secret/Generate a cryptographically strong random secret, locally in your browser.fail2ban/Test a fail2ban failregex against sample log lines and see the host it would ban.