Offline Timezone Converter - No Server, 100% Private | 2025
Browser-based timezone converter works offline without server uploads. Convert time between 30+ zones with DST. Meeting planner finds optimal times. Quick presets: NY→London, SF→Tokyo. Zero ads, instant results.
Time Converter
From
To
Converted Time
Current Time
Tips & Features
- • Automatic DST: Daylight Saving Time is automatically calculated for all timezones
- • Meeting Planner: Finds optimal meeting times based on participants' working hours (9 AM - 5 PM)
- • Quality Rating: Optimal (80%+ in working hours), Good (60%+), Acceptable (40%+)
- • Smart Caching: Your timezone preferences are saved in your browser
- • Share Results: Copy or share conversion results with others
- • Trading Hours: Perfect for checking global market hours and trading sessions
How to Use
- 1
Use quick presets or search
Click a preset like "NY → London" for instant conversion, or search timezones by city/country
- 2
Select your timezones
Your local timezone is auto-detected. Choose target timezone from 30+ options with search
- 3
Set date and time
Pick any date/time. See business hours and DST indicators automatically
- 4
Share via URL
Copy the URL to share your exact conversion settings - they'll see the same view instantly
Frequently Asked Questions
Why is this timezone converter different from others?
Why is this timezone converter different from others?
Unlike most converters that send your data to servers, ours runs 100% in your browser. This means it works offline, protects your privacy, and delivers instant results. No ads, no signups, no server delays.
Can I use this converter without internet?
Can I use this converter without internet?
Yes! Once the page loads, all calculations happen in your browser. Perfect for corporate environments with strict security policies or when traveling with limited connectivity.
How does the meeting planner find optimal times?
How does the meeting planner find optimal times?
It analyzes business hours (9 AM - 5 PM) across all participant timezones. Times are rated as: Optimal (80%+ in business hours), Good (60%+), or Acceptable (40%+). Green badges show business hours for easy identification.
Why should I trust your DST calculations?
Why should I trust your DST calculations?
We use the browser's built-in Intl.DateTimeFormat API which is maintained by your operating system. This ensures DST rules are always current without requiring updates from us. You'll see "DST" and "Business Hours" badges for clarity.