Every tool you need for timestamps and dates

Q: Is my data private?

Yes. Every calculation runs entirely in your browser. Nothing you type is sent to a server.

Convert Unix timestamps, compare time zones, and calculate date differences, ages and cron schedules — in seconds. Every tool is free to use and runs right in your browser.

—Unix time (s)

—UTC

—Your local time

⚡ Instant results 🔒 Private — runs in your browser 💯 Free to use

Choose a tool to get started

Pick one of our time & date tools below. No sign-up required.

Timestamp Converter Convert Unix epoch to a human date and back — seconds or milliseconds, local or UTC. Time Zone Converter See one moment across multiple time zones at the same time. Date Difference Calculate the duration between two dates, including business days. Age Calculator Find an exact age in years, months and days, plus the next birthday. Cron Explainer Translate a cron expression to plain English and see its next run times. Date Add / Subtract Add or subtract days, weeks, months or years from any date.

Why use Chrono Tools

🔒Private by designEvery conversion happens in your browser. The values you enter are never uploaded.

⚡Fast and freeNo queues, no sign-up, nothing to install. Results update as you type.

📱Works everywhereUse it on your computer, tablet or phone. Add it to your home screen and use it offline.

Frequently Asked Questions

Are these tools really free?

Yes. Every tool is free to use, with light limits such as batch size and how many time zones you can compare at once. To go past them, pay once to lift the limits on the tool you have open until you close the page, or go Premium.

Is my data private?

Yes. Every calculation runs entirely in your browser — nothing you type is ever sent to a server.

What is a Unix timestamp?

A Unix timestamp is the number of seconds (or milliseconds) since 1 January 1970 UTC, also called Unix epoch time. Our converter turns it into a readable date and back.

Do I need an account?

No account is needed to use the tools. You only go through checkout if you choose to pay once or go Premium.

Does it handle time zones and DST?

Yes. Time zone conversions use your browser's built-in time zone database, including daylight saving time.

Can I use it on mobile?

Yes. Chrono Tools works on any modern browser and can be installed as an app on your phone.