# TimeConverter.ai > Free world clock and time zone converter. Real-time local time in 90+ cities worldwide. Convert time between any two cities instantly. ## What is TimeConverter.ai? TimeConverter.ai is a free, browser-based tool for checking the current local time in cities around the world and converting time between time zones. It requires no sign-up and works on any device. ## Features - **World Clock**: Real-time clocks for 90+ cities across all continents - **Time Zone Converter**: Convert any time from one city to another instantly - **Best Time to Call**: Visual overlap of working hours (09:00–17:00) between two cities to find the best window for international calls - **Countdown Timer**: Count down to any future event in any time zone - **Favourites**: Heart-mark cities to pin them to the top - **Share links**: Share a specific time conversion via URL ## Coverage Cities covered include major hubs in: - Europe: Stockholm, London, Paris, Berlin, Amsterdam, Madrid, Rome, Zurich, Moscow, Istanbul, and more - Americas: New York, Los Angeles, Chicago, Toronto, São Paulo, Buenos Aires, Mexico City, and more - Asia: Tokyo, Shanghai, Singapore, Dubai, Mumbai, Seoul, Bangkok, Hong Kong, and more - Oceania: Sydney, Melbourne, Auckland, Perth - Africa: Cairo, Nairobi, Lagos, Johannesburg, Casablanca, and more - Middle East: Dubai, Riyadh, Tel Aviv, Tehran, Doha, and more ## Common time zone questions this tool answers - What time is it in [city] right now? - What is the time difference between [city A] and [city B]? - When should I schedule a meeting between [city A] and [city B]? - What time is [time] in [city] converted to [city]? - How many hours ahead/behind is [city] compared to [city]? ## Key facts - URL: https://timeconverter.ai - Free to use, no account required - Updates in real time using the browser's system clock - Supports all IANA time zones - Handles daylight saving time automatically ## Source All time data is calculated client-side using the browser's built-in `Intl.DateTimeFormat` API with IANA time zone identifiers. No external API calls are made for time data.