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🌐 Time Zone Converter
Pick a source time zone and a moment in time — see the equivalent in all major world time zones. Handles DST automatically using your browser's Intl API.
Examples
NYC 9:00 AM ESTLondon 2 PM · Paris 3 PM · Sydney 1 AM (next day)Tokyo 00:00 JSTUTC 15:00 (prev day) · LA 16:00 PSTFrequently asked questions
Does it handle DST?
Yes. We use the IANA timezone database via the browser's Intl API, which knows DST rules for every zone including their historical changes.
What is the difference between EST and EDT?
EST = Eastern Standard Time (winter, UTC−5). EDT = Eastern Daylight Time (summer, UTC−4). "America/New_York" auto-switches between them.
Should I use UTC or my local zone for log timestamps?
UTC. Always store and exchange in UTC; convert to local only for display. Saves a thousand bugs from DST changes and travelers.
About this tool
Time Zone Converter runs entirely in your browser using standard Web APIs. No data is sent to any server. The source for this tool is in our public GitHub repository.
Related tools
- 🔄 Timestamp Converter — Convert between Unix timestamp, ISO 8601, and human-readable date formats.
- 📅 Working Days Calculator — Count business days between two dates, excluding weekends and optional holidays.
- 📅 Date Difference — How many days, weeks, months between two dates? Plus workdays.
Why this tool
vs typical free web-tool sites
| 1vw | Typical free site | |
|---|---|---|
| Price | Free | Free |
| Signup required | No | Often (for premium features) |
| Ads inside the tool | No | Yes (banner + video) |
| Data sent to server | No (browser-only) | Yes (inputs analyzed for ads) |
| Total tools | 96 | Often <20 or scattered across sites |
| Bookmarkable URL per tool | Yes | Mixed |
| Loads in under 1s | Yes (static) | Often slow (ad tracking) |
| Multilingual | EN / ES / PT / FR / DE | Usually EN only |
| Open source | Yes | No |