JPKCom DB

Time Converter

Convert Unix timestamps, calculate time differences, and compare time zones — client-side in your browser. Start here for the manual, examples, and tips.

Time, timestamps, and time zones in one place

The Time Converter converts between Unix timestamps and readable date/time values, shows the current time live in many formats, and calculates time differences between two points in time. No mental arithmetic, no library to install — you enter a value, click Convert or Calculate, and get the result instantly.

At its core the tool answers three recurring questions from everyday development and admin work: Which date hides behind this Unix timestamp? Which timestamp belongs to this date? And: How much time lies between these two points? On top of that comes a live clock you can display in any time zone and language format.

The Time Converter is built for anyone who handles timestamps regularly: developers who hit bare Unix seconds in logs, databases, or API responses; admins tracing cron runs or token expiry times; and anyone who quickly needs to know how a moment looks in another time zone or language.

What the Time Converter does — at a glance

  • Current — a live clock that refreshes every second and shows the current time in eleven formats at once (Unix timestamp, ISO 8601, localized long and short forms). Can be paused and resumed with a button.
  • Convert — converts date/time → Unix timestamp and Unix timestamp → date/time, each into the same eleven formats. A Get Server Time button fetches the current timestamp straight from the server clock.
  • Timeago — calculates the difference between a date and now, or between two freely chosen points, broken down by years, months, days, hours, minutes, and seconds plus a readable summary.
  • Language Format — render the output in over 60 language formats (German, English, French, Japanese …).
  • Timezone — display the output in a chosen time zone (CET by default, plus generic zones and Etc/GMT offsets).

The tech under the hood

All the time logic runs through the JavaScript library Day.js with its plugins for UTC, time zones, localized formats, relative time, and parsing custom formats. Unix timestamps are always handled in seconds (not milliseconds) — the way PHP's time() or Unix logs deliver them.

The time-zone picker is a curated list of generic zone abbreviations (CET, EET, EST, PST8PDT …) and Etc/GMT offsets — not the full IANA city catalog and not your browser's automatic time zone. Exactly which zones are on offer and what to watch for with the Etc/GMT signs is covered in the manual.

Architecture: client-side — with an honest server clock

Conversion, comparison, and formatting happen entirely inside your browser; the values you enter never leave it. There is exactly one optional server interaction: the Get Server Time button queries a small endpoint (/tools/time/time/) that returns nothing but the server clock's current Unix timestamp as plain text. Nothing of yours is transmitted — the response is just a number. If you type values yourself, no server contact happens at all.

Try it now

→ Open the Time Converter — pick a tab, enter a value, click Convert or Calculate. No account, free, right in the browser.

  • Cron generator — build and understand cron expressions when you want to know when a scheduled run is next due.
  • UUID generator — produce time-based UUIDs (v1, v7) that carry a timestamp inside them.
  • Hash generator — compute checksums, for instance for time-stamped records.

There's more on the sub-pages: the manual with every function and format, real-world examples, and collected tips & tricks.