Compared · checked 2026-10-24
The best free time zone converters and world clocks
Converting a time across cities is easy; finding a meeting slot that suits everyone, or knowing the exact time, is where the tools differ. Here is what each one does for free, from its own pages.
We make World Clock, one of the tools on this page. Every fact about the other tools comes from their own pages, linked under each one, as they read on 2026-10-24. Prices and features change: check each site before you choose.
How we compared them
- Convert a time and compare several cities at once
- Plan a meeting across time zones and share it
- Exact time, apps and widgets
- Sign-up, and where the time comes from
At a glance
| Tool | Price | Account | Meeting planner | Exact time source | Apps |
|---|---|---|---|---|---|
| World Clock ours | Free | Not needed | Yes (working-hours overlap) | Your device clock (manual offset) | Works in the browser |
| World Time Buddy | Free | Only to save settings | Yes | Not stated | Mobile app, widgets |
| Every Time Zone | Free; Pro features (Meetings, People, iCal, Customize) | Not stated | Yes; more in Pro | Not stated | Not stated |
| Time.is | Free (ad-free option closed to new users) | Not stated | Not stated | Its server, synchronised to atomic clock time | iPad app (one-time fee) |
| Feature | World Clock ours | World Time Buddy | Every Time Zone | Time.is |
|---|---|---|---|---|
| Free | Yes | Yes | Partly | Yes |
| Convert a time between zones | Yes | Yes | Yes | Yes |
| Several cities at once | Yes | Yes | Yes | Yes |
| World clock | Yes | Yes | Yes | Yes |
| Meeting planner | Yes | Yes | Yes | Not stated |
| Working hours in each city | Yes | Not stated | Not stated | Not stated |
| Share a link | No | Yes | Yes | Not stated |
| Add to a calendar | In Calendar | Yes | Partly | Not stated |
| Exact time from a server | No | Not stated | Not stated | Yes |
| Stopwatch or timer | Yes | Not stated | Not stated | Yes |
| Widgets | No | Yes | Not stated | Yes |
| Phone app | Works in the browser | Yes | Not stated | iPad only |
| No sign-up needed | Yes | Yes | Not stated | Not stated |
| Works offline | Yes | Not stated | Not stated | Not stated |
| Times worked out on your device | Yes | Not stated | Not stated | No |
1. World Clock (ours)
Best for: Planning across time zones privately and offline, with working hours shown
A world clock with the local time, GMT offset and working hours in each city, a converter, a meeting planner that finds the hours everyone is at work, a stopwatch and a timer, all from your browser's own time zone data.
Good
- Every IANA time zone, with daylight saving from your browser's own data
- Meeting planner by working hours; a chosen slot can be saved to Calendar
- Stopwatch and countdown timer; the times come from your browser, not a time server
- Works on your phone, tablet and computer in the browser, even offline
Not so good
- The time is your device clock; to correct it you type a reference time by hand
- No share links, calendar invites for other apps or widgets
- Still being built
2. World Time Buddy
Best for: Comparing several cities hour by hour and sending a meeting to your calendar
Good
- World clock, time zone converter and meeting scheduler in one grid
- Add a chosen time to Outlook, iCal or Google Calendar, or share a link
- World clock and event widgets, and a mobile app; time zone data from TZDATA
Not so good
- Settings are saved only if you sign in
- The page needs JavaScript to work
World Time Buddy website · Sources: World Time Buddy, About World Time Buddy
3. Every Time Zone
Best for: A quick visual timeline of a list of cities, with a link to share
Good
- One timeline across many cities with UTC offsets
- Share a link to a time
- Finds the best time for a meeting
Not so good
- Meetings, People, iCal sharing and customising are marked Pro
- Pro prices are not shown on the pages we could read
Every Time Zone website · Sources: Every Time Zone
4. Time.is
Best for: Checking the exact time anywhere, and how far off your own clock is
Good
- Exact, official atomic clock time for more than 7 million locations in 58 languages
- Time zone converter for several places, countdown, timer and widgets
Not so good
- The ad-free subscription is not open to new subscribers, as its page says
- Its apps page lists only an iPad app so far
Time.is website · Sources: Time.is, Time.is converter, Time.is apps, Time.is FAQ, Time.is Ad-free
Which one to choose
World Clock is our pick for planning across time zones privately: working hours in each city, a meeting planner that finds the overlap, a stopwatch and a timer, all worked out on your device with no sign-up, installable and usable offline. It relies on your device clock and cannot send invites to other calendars.
Choose World Time Buddy to compare cities hour by hour and send a meeting to Outlook, iCal or Google Calendar, with widgets and a mobile app. Choose Time.is when you need the exact time from a server, and Every Time Zone for a quick visual timeline with a share link (meetings are in Pro).
Questions
What is the best free time zone converter?
World Clock for a private planner with working hours that works offline; World Time Buddy for comparing many cities and sending invites, Every Time Zone for a quick timeline, and Time.is for the exact time.
Which tool shows the exact time?
Time.is says it shows exact atomic clock time from its server. World Clock uses your device clock, with a manual offset if you know it is off.
Do these handle daylight saving time?
World Clock uses your browser's time zone data for the date you pick, so the offset in force that day is used. World Time Buddy names TZDATA as its main data source.
Can I plan a meeting across time zones for free?
Yes. World Time Buddy, Every Time Zone and World Clock all help find a time; World Clock shows the hours when everyone is inside working hours.
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