Phone Number Validator
Validate international phone numbers with libphonenumber — real per-region rules, line type, and E.164 / national / international formats.
How phone number validation works
Phone numbers follow country-specific rules defined by the ITU-T E.164 standard. This validator uses libphonenumber— Google’s phone-number library (the same rules behind Android) — so it validates 200+ regions with real length and prefix rules, detects the line type (mobile, fixed line, toll-free, VoIP, …), and formats the number three ways: E.164 (the canonical international form, e.g. +14155552671), national, and international. Numbers typed without a +code are interpreted using the selected default region. Your number stays on your device — it is never uploaded, and (unlike most inputs on this site) it is deliberately kept out of the shareable page URL.
Private & free — this tool runs entirely in your browser.