HighlightZone

Detect timezones from US/Canadian phone numbers. Highlight any phone number to see its timezone and current time.

HighlightZone makes it effortless to identify the timezone of any U.S. or Canadian phone number — directly from your browser. Whether you’re scheduling a call, messaging a client, or coordinating with remote teams, HighlightZone gives you instant clarity on where and when your contacts are. Simply highlight any phone number on a webpage, and HighlightZone instantly detects the corresponding timezone and displays the current local time in a clean, minimal popup. No copy-pasting, no external tools — just quick, contextual insight. Features • 🕒 Instantly detect the timezone and current local time for any U.S./Canadian phone number • ⚡ Works anywhere — highlight phone numbers on any webpage • 🔒 Privacy-first: No data collection or external requests • 🎨 Simple, lightweight, and intuitive interface • 🌙 Works in both light and dark modes • 🧩 Manifest V3 compliant and secure