Free · No signup · Runs in your browser

Unix Timestamp Converter

Convert any epoch timestamp to a human-readable date — and turn any date back into Unix seconds or milliseconds.

Unix Timestamp Converter

Convert an epoch timestamp to a human date, and any date back to Unix seconds.

Now—

Paste 10-digit seconds or 13-digit milliseconds — it auto-detects.

date → unix
Seconds
Millis
Features

Everything Unix does

Both directions, with second and millisecond support and the live epoch ticking at the top.

Auto-detects units

Paste 10-digit seconds or 13-digit milliseconds and it figures out which you meant.

Every format

Shows the UTC string, your local time, strict ISO 8601 and a human-readable relative time.

Both directions

Convert epoch to a date, and pick a date to get Unix seconds and milliseconds.

Live current time

The current Unix timestamp ticks at the top, ready to copy.

How to use

Convert a timestamp in two steps

1

To read an epoch, paste the number into the timestamp box — seconds or milliseconds both work.

2

To make an epoch, pick a date and time and copy the seconds or milliseconds.

3

Grab the current time from the live value at the top whenever you need it.

FAQ

Questions & answers

Everything you might wonder about this tool.

01Seconds or milliseconds — which does it expect?
Either. A value with 12 or more digits is treated as milliseconds; shorter values are treated as seconds, which covers normal dates well into the next century.
02What is a Unix timestamp?
It is the number of seconds elapsed since 1 January 1970 UTC (the Unix epoch). It is a compact, timezone-free way to store a moment in time.
03What timezone is used?
Epochs are absolute, so the UTC and ISO outputs are unambiguous; the Local line and the date picker use your device's timezone.
04Is any of my data uploaded to a server?
No. This tool runs entirely in your browser with JavaScript — your input never leaves your device, so it is safe to use with private tokens, config and source code.
05Is it free, and do I need an account?
Yes, it is completely free with no signup, no install and no usage limits. Open the page and it works instantly on desktop or mobile.
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