I kept needing the same small checks in side projects — is this email real, is this phone number formatted right, is this card number even valid — so I built a set of free tools and put the same logic behind a tiny hosted API. Sharing in case it saves someone else time.
Live tools (no signup): https://tools-site.cchkjjdobby.workers.dev
What it does
Email — syntax, disposable/role detection, typo suggestions (gmial.com → gmail.com), and a real MX-record deliverability check (not just regex).
Phone — E.164 formatting + country detection for 35+ countries.
