Timestamp Converter

Convert between Unix timestamps and readable dates, in seconds or milliseconds, using your device’s local timezone.

Current timestamp (updates live)

Seconds (10 digits)—

Milliseconds (13 digits)—

Current local time—

Timestamp to date

Date to timestamp

Local times use your device’s timezone; the UTC row is shown alongside so values can be compared across timezones without confusion.

Runs locally in your browser. Nothing is uploaded.

What is Timestamp Converter?

Timestamp Converter is a free online tool that converts Unix timestamps into readable dates and times, and readable dates back into timestamps. A Unix timestamp is the number of seconds, or in some systems milliseconds, that have passed since 1 January 1970 at 00:00:00 UTC. Because it is a single number with no formatting or timezone attached, it is the most common way for programs, databases, and APIs to store and exchange times. The trouble is that a bare number like 1700000000 means nothing to a human reader, and that is exactly the gap this tool closes.

The page starts with a live clock showing the current timestamp in both seconds and milliseconds, so the current value is always one click away. Converting a timestamp shows three things at once: the date and time in your device’s local timezone, the same moment in UTC, and how far it lies in the past or future relative to now. The reverse direction takes a date and time picked in your local timezone and returns both the seconds and milliseconds forms. A seconds-versus-milliseconds toggle removes the most common source of errors: entering a 13-digit millisecond value where seconds were expected produces a date thousands of years in the future, and this tool lets you state the unit explicitly instead of guessing.

How to use Timestamp Converter

To convert a timestamp, type it into the first box, choose seconds, milliseconds, or auto-detect, and click “Convert”. The local time, UTC time, and relative time appear below. Click “Use now” to fill the box with the current timestamp. To convert the other way, pick a date and time in the second section and click “Convert” to get the matching seconds and milliseconds timestamps. Use the copy buttons to copy either current value to the clipboard.

Frequently asked questions

How do I tell seconds from milliseconds?
Count the digits. A current seconds timestamp has 10 digits, while a milliseconds timestamp has 13. Auto-detect mode uses the same rule: values of 100 billion or more are treated as milliseconds, and smaller values as seconds.

Why does my result differ by a few hours from someone else’s?
That is a timezone difference, not an error. A timestamp names one single instant worldwide, but the clock reading for that instant depends on the viewer’s timezone. Compare the UTC row when two people in different timezones need to agree.

What does the relative time mean?
It measures the gap between the converted moment and right now, broken into days, hours, minutes, and seconds, and labelled “ago” for the past or “from now” for the future. It is handy for judging whether a log entry is recent or old.

Is my input sent anywhere?
No. All conversion happens in your browser, and nothing you enter is uploaded.