Timestamp to Date Converter

One number, one instant, many labels

A Unix timestamp is the most portable way computers store a moment: a single count of seconds since the 1970 epoch, identical on every machine on Earth. What it is not is readable. This page turns that count back into a date with the timestamp converter — and deliberately shows both UTC and your browser's local time, because the gap between them is where deadline and logging bugs breed.

Seconds, milliseconds, and the 10-digit test

The most common conversion error is a factor of a thousand. JavaScript's Date.now() returns milliseconds (13 digits today); most Unix tools and APIs return seconds (10 digits). If your converted date lands in 1970 or the year 57000, you picked the wrong unit — this converter detects the unit from the digit count so the mistake rarely survives. The dedicated milliseconds to date page goes deeper on the JavaScript case, while the epoch converter covers the same ground under its other name.

Everyday sightings

Timestamps hide in API responses, JWT tokens (iat and exp claims), database exports, file names and error logs. Being able to read one at a glance — is this token expired, did the job run before the deploy — turns debugging from guesswork into reading.

Private by design

Conversion runs locally in your browser. Pasted log lines and token values never leave your machine.

Frequently asked questions

What is a Unix timestamp?

The number of seconds (or milliseconds) elapsed since 1 January 1970, 00:00:00 UTC — the Unix epoch. Because it is timezone-free, systems worldwide store and exchange timestamps, then render them as local dates for humans.

Is my timestamp in seconds or milliseconds?

Seconds values are currently 10 digits (e.g. 1761000000); milliseconds values are 13 digits. The converter auto-detects by length, and both are common — APIs often use seconds, JavaScript uses milliseconds.

Why do UTC and local time both matter?

The timestamp is one instant; its date label depends on where you stand. A timestamp can be Tuesday in UTC and still Monday in Los Angeles. Showing both prevents off-by-a-day bugs in logs, billing and deadlines.

What dates can timestamps represent?

In seconds, the classic signed 32-bit range runs to 19 January 2038 — the famous Year 2038 limit. 64-bit values, which this converter uses, stretch effectively forever for practical purposes.

Is anything I paste uploaded?

No. Conversion happens in your browser. Log fragments and IDs you paste are never sent anywhere.

Related tools

• Timestamp converter — Convert Unix timestamps to readable dates and back. Handles seconds and milliseconds, UTC and local time.
• Unix Timestamp Converter — Convert Unix timestamps to readable dates and back. Auto-detects seconds vs. milliseconds, shows UTC and local time — free, no sign-up.
• Epoch Converter — Convert epoch time (seconds or milliseconds since 1970) to dates and back. Built for JavaScript Date.now() values — free, no sign-up.
• Milliseconds to Date Converter — Convert a millisecond timestamp — the 13-digit kind JavaScript's Date.now() returns — into a readable date and time, in UTC and your local timezone.…
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