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Format phone numbers to E.164, International, and National formats. Supports 240+ countries. Powered by Google's libphonenumber. Phone Number Formatter instantly converts any phone number to E.164, International, National, and RFC3966 (tel:) formats — directly in your browser, with no data ever leaving your device. HOW TO USE • Click the extension icon and type or paste any phone number • Or: select a phone number on any webpage → right-click → "📞 Format Phone Number" — the extension opens pre-filled automatically FEATURES ✓ All four international formats in one click · E.164 (+14155550132) — for APIs, SMS gateways, Twilio, databases, CRMs · International (+1 415 555 0132) — for websites, email signatures, business cards · National ((415) 555-0132) — for domestic display · RFC3966 (tel:+1-415-555-0132) — for HTML click-to-call links and vCards ✓ 240+ countries supported — powered by Google's libphonenumber (used by Google, WhatsApp, Twilio, Apple) ✓ Auto-detects country code from the number itself ✓ Remembers your last-used country for faster repeat use ✓ Validates the number and shows phone type (mobile, landline, VoIP) ✓ One-click copy for each format ✓ Right-click context menu — format any number you see on a webpage ✓ Handles RFC3966, E.164, IDD (00XX), national, and messy inputs PRIVACY FIRST All formatting happens locally in your browser using JavaScript — your phone numbers never leave your device. The extension makes zero network requests. No analytics, no tracking, no telemetry. Permissions used: • contextMenus — to add the right-click "Format Phone Number" menu item • storage — to remember ynce (stored locally, never transmitted) WHY E.164 MATTERS If you work with Twilio, S SNS, Salesforce,HubSpot, or any SMS API — E.164 is the required format. A wrong format means failed messages, misroutecords. This extensionnormalises any number in one click. For bulk formatting of 100+ numbers at once, visit phonenumberformatter.app — the free full-featured we