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SyncZones: Free Timezone Overlap Visualizer

A free timezone and time zone overlap visualizer for remote teams: find shared working hours across up to 5 regions, click any hour to copy meeting times, and share one link — no sign-up needed.

Quick Tips:

  • Click any timezone name to rename it to a person or team (e.g., "Sarah").
  • Click any hour block in the timeline to instantly copy the meeting times to your clipboard.
  • Use Save Team to remember your core zones for next time on this device.
  • Scheduling in Outlook or Teams? See how to schedule meetings across time zones in Outlook — then paste your SyncZones link into the invite.

Want deeper help? See overlap guides by corridor, the meeting scheduler for different time zones guide, Outlook & time zones, and the full SyncZones blog (New York ↔ Lagos, US–Europe DST, tool comparison).

Overlap Visualizer

Business Hours (9 AM - 5 PM)

Popular guides

Meeting scheduler — Multi–time zone scheduler (free, no sign-up) Outlook — Schedule meetings across time zones in Outlook & Teams How-to — Step-by-step scheduling across 3–5 time zones Basics — What is time zone overlap? Corridors — City-pair overlap hub (London–NY, US–India, …) London–New York — Best meeting times & DST DST gap — US–Europe “broken meeting” weeks Tools — Free overlap tools compared (2026)

What is timezone overlap?

Timezone overlap is the window of time when two or more distributed teams are simultaneously within their standard working hours. For example, a team in London (GMT) and a team in New York (EST) share roughly 9 AM–1 PM GMT as mutual business hours. SyncZones visualizes this window instantly — so you can pick a meeting time that is fair for everyone, not just one side.

How SyncZones works

Add up to 5 time zones — search by city name or IANA identifier. Rename each zone to a team member or city. The overlap visualizer highlights shared business hours (9 AM–5 PM) across all zones. Click any hour block to copy that moment's local times to your clipboard. Hit Copy Share Link to get a URL that opens the exact same view for anyone on your team.

Frequently asked questions

How many time zones can I compare?

SyncZones supports up to 5 simultaneous time zones. You can search for any city or IANA timezone (e.g., "Tokyo" or "America/Chicago"), rename each zone to a person or team, and instantly see shared working-hour overlap for the whole group.

How do I share my team's timezone setup?

Click Copy Share Link. SyncZones encodes your entire team setup — all time zones, custom names, and selected date — into a single URL. Paste it in Slack, a calendar invite, or email and everyone sees the exact same view.

Does SyncZones handle Daylight Saving Time automatically?

Yes. SyncZones uses your browser's built-in Intl API with full IANA timezone support, so DST transitions are handled automatically. Change the date in the date picker to see how your overlap window shifts during transitions — useful for planning ahead around the March and November DST switches.

Is SyncZones free? Do I need to create an account?

SyncZones is completely free with no account or sign-up required. Your timezone setup is stored in the URL (for sharing) and optionally in your browser's local storage via Save Team — nothing is sent to any server.

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