Timezone Converter

Select date/time text on any webpage and convert it to another timezone.

Timezone Converter lets you select any date and time on a webpage and instantly convert it to another timezone — no copying, no Googling, no mental math. HOW IT WORKS 1. Select a date or time on any webpage (emails, articles, calendars — anywhere) 2. Press Option+D (Mac) or Alt+D (Windows/ChromeOS), or right-click and choose "Convert Timezone" 3. Start typing a city name — the fast autocomplete narrows 280+ cities in real time 4. Press Enter — the converted time appears right next to the original text WORKS EVERYWHERE (Mostly - is not working in Google Docs) In editable text (Gmail, text fields): the converted time is inserted in brackets right after your selection, e.g. [Mar 26, 2025, 11:00 PM JST, Tokyo]. On read-only pages (news articles, documentation, wikis): a floating tooltip shows the converted time for 3 seconds near the selected text. SMART DATE PARSING Handles the way humans actually write dates and times: - "March 26 10AM" - "3/15/2025 2:30 PM" - "15 Jan 2024 14:30 EST" - "Friday, December 1st at noon" - "2024-01-15T10:30:00" - And dozens more formats TIMEZONE-AWARE - Displays proper timezone abbreviations (PST, JST, CET, IST — not "GMT+9") - Automatically accounts for Daylight Saving Time (PST vs PDT, CET vs CEST, etc.) - Your default timezone is auto-detected from your system — or set it manually in settings FAST & LIGHTWEIGHT - No external API calls — all conversion happens locally using your browser's built-in Intl API - No data leaves your browser - No account required - Minimal permissions: only activates on the current tab when you invoke it KEYBOARD-FIRST - Option+D / Alt+D to invoke - Type to search cities instantly - Arrow keys to navigate results - Enter to select — done 280+ cities across every timezone, including major cities in North America, Europe, Asia, Africa, Oceania, and South America. ------ PERMISSION JUSTIFICATIONS: - activeTab: Required to read selected text and insert the converted result on the current page. - storage: Stores the user's preferred default timezone setting. - contextMenus: Adds a "Convert Timezone" option to the right-click context menu. - scripting: Injects the conversion dialog and logic into the active tab when invoked.