Free · Browser-only · No upload

Time zone converter — world time online free

Convert time zone, compare offsets, UTC, IST, PST, and more

Enter a unix timestamp and pick two IANA time zones to convert time zone values side by side. This free time zone converter online works as a world time converter, time difference calculator, and UTC time zone converter — all in your browser.

Compare time zones for meetings, on-call handoffs, or forex sessions without installing a world clock app. Switch to Unix Time to Date or Date to Unix Timestamp from the toolbar when you need epoch conversion instead.

Unix time to date Date to unix timestampTime zone converter

Unix timestamp

From time zone

To time zone

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Time zone converter — world time, UTC, IST, PST, CET, and time difference calculator.

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How zone conversion works

Software stores one UTC instant (unix timestamp). Display in a zone applies the IANA offset rules for that region at that instant via Intl.DateTimeFormat — including daylight saving transitions.

Meeting example

Unix 1781257035 displays as afternoon in Asia/Kolkata and morning in America/New_York on the same row — useful for comparing time zones before sending invites.

Common zone mappings

From	To	Result	Note
UTC	America/New_York	Eastern (ET)	US East Coast
UTC	America/Los_Angeles	Pacific (PT)	US West Coast
UTC	Asia/Kolkata	IST	India
UTC	Europe/Paris	CET/CEST	Central Europe
UTC	Asia/Tokyo	JST	Japan

Guide to time zone conversion and world time differences

What this time zone converter does

A time zone converter takes one instant — expressed here as a unix timestamp — and shows how wall clocks read in two regions. Unlike a static world clock, you control the exact moment, which matters for recurring meetings, release windows, and log correlation.

This global time zone converter uses IANA names such as America/New_York and Asia/Kolkata so results respect daylight saving rules automatically. It doubles as a time zone difference calculator by surfacing the offset gap between your selected zones.

How to convert time zone online

Paste or type a unix timestamp (seconds auto-detected). Choose a source zone and target zone from the dropdowns. Copy the formatted local times or ISO UTC from the output grid.

To convert time with timezone context for a future event, set the timestamp from Date to Unix Timestamp first, then open this page. For utc to eastern time checks, set source UTC and target America/New_York.

International time zone converter searches often mean the same workflow: same instant, two regional displays. This page is a lightweight alternative to heavyweight worldclock converter sites that track ads and cookies.

Time difference calculator use cases

Remote teams use a time zone calculator for meetings to find overlap between PST, EST, CET, and IST. Paste the proposed unix time, compare zones, and copy results into calendar invites.

Calculating time difference between countries starts with picking the correct IANA zones — country borders do not map 1:1 to offsets. India uses a single zone; the United States uses several.

Forex and finance searches for forextimezone converter or market open hours benefit from quick UTC ↔ regional checks. Always confirm liquidity windows against an official exchange calendar.

Popular zone shortcuts

Utc time zone converter mode: set source UTC. For ist time zone converter or ist time converter, pick Asia/Kolkata. Pst time zone converter and pt time zone converter map to America/Los_Angeles. Et time zone converter and eastern time zone conversion use America/New_York. Cet time zone converter and central european time converter use Europe/Paris or Europe/Berlin.

Japanese time zone converter maps to Asia/Tokyo. Gmt time conversion is equivalent to UTC for most software systems, though civil GMT labels can differ during British Summer Time — IANA Europe/London handles that nuance.

Privacy and related tools

Timestamps for unreleased launches or confidential calls are processed locally. No data is sent to a time and date world clock converter API.

Pair with Unix Time to Date when decoding raw log integers, or Date to Unix Timestamp when building the instant from a calendar picker first.

Detailed guide

Planning a three-zone meeting

Convert once in UTC, then run this tool twice with different target zones, or note offsets from the stats row below the output.

Reading distributed trace timestamps

Normalize log lines to unix seconds on Unix Time to Date, then paste here to see each region's wall clock for the same event.

Common questions

Time Zone Converter FAQ

How do I convert time zone online for free?

Enter a unix timestamp, pick two IANA zones, and copy the results. This free time zone converter runs entirely in your browser.

Is this a world time converter?

Yes — it shows the same instant in two world regions, working as a world time calculator and international time zone converter.

How do I compare time zones?

Select source and target zones. The output grid and stats row show both local times and the offset gap between them.

UTC to eastern time — how?

Set source UTC and target America/New_York. The tool applies daylight saving rules for the timestamp you entered.

Time difference calculator between countries?

Pick the correct IANA zones for each country region. The stats row summarizes the hour difference for your chosen instant.

Does the Time Zone Converter send my input to a server?

Yes. Everything runs in your browser. Your input is not uploaded, logged, or stored on our servers.

Do I need an account?

No account or sign-up is required. Open the page and start using the tool immediately.