Time tools is a collection of browser-based utilities for working with dates, time stamps, and time zones. The set currently includes a timezone converter, a Unix timestamp converter, and a date calculator.

Are calculations accurate?

Yes. Every tool uses the JavaScript Date API and Intl.DateTimeFormat, which rely on the IANA timezone database shipped with your browser. Leap years, daylight saving rules, and partial-hour offsets are all handled correctly.

Do I need an account?

All time tools are open access. Click any tool and start using it immediately. Nothing is stored, logged, or synced.

What time zones are supported?

Every IANA zone exposed by Intl.supportedValuesOf('timeZone') is supported, currently more than 400 zones covering every region. Quick-pick shortcuts are included for major cities like New York, London, Tokyo, and Sydney.

Time tools

Free time tools that run entirely in your browser. Convert between time zones using the IANA timezone database, decode Unix timestamps in seconds or milliseconds, and calculate days between dates. No account or installation required.

Read the complete time tools guide

Unix timestamp

Convert between Unix timestamps and human-readable dates. Seconds or milliseconds.

Date calculator

Days between dates, add or subtract days, calculate age, or count down to a future date.

Timezone converter

Convert any time between time zones using the IANA database. Includes common shortcuts for major cities.

How to use time tools

Pick the tool you need from the list above.
Enter your date, time, or timestamp in the input fields provided.
Results appear instantly as you type or pick values.
Copy the result or use the dedicated slug pages for specific use cases.

When to use these tools

Scheduling a meeting across regions? Use the timezone converter with the IANA database to find a workable hour for everyone.
Debugging an API response or log entry? Decode Unix timestamps in seconds or milliseconds into human-readable dates.
Counting down to a launch or working out how many days between two dates? Use the date difference and add or subtract tool.
Curious about how old someone is in years, months, and days? Try the age calculator for an exact breakdown.

Frequently asked questions

What are Time tools?: Time tools is a collection of browser-based utilities for working with dates, time stamps, and time zones. The set currently includes a timezone converter, a Unix timestamp converter, and a date calculator.
Are calculations accurate?: Yes. Every tool uses the JavaScript Date API and Intl.DateTimeFormat, which rely on the IANA timezone database shipped with your browser. Leap years, daylight saving rules, and partial-hour offsets are all handled correctly.
Do I need an account?: All time tools are open access. Click any tool and start using it immediately. Nothing is stored, logged, or synced.
What time zones are supported?: Every IANA zone exposed by Intl.supportedValuesOf('timeZone') is supported, currently more than 400 zones covering every region. Quick-pick shortcuts are included for major cities like New York, London, Tokyo, and Sydney.