TOTP Bench, a browser-local authenticator workbench

Field notes

TOTP Bench implements the familiar authenticator workflow inside one browser tab: it generates or accepts a Base32 secret, creates an otpauth:// URI, and displays a rotating code. Parameters include SHA1, SHA256, and SHA512, plus six- or eight-digit output and 30- or 60-second periods. The page explicitly separates testing from production use, recommending locally minted secrets for fixtures and manual checks while directing real enrollment back to the service being protected.