Unix Timestamp Converter

Convert Unix timestamps to readable dates and back, with seconds and milliseconds support.

100% private — everything runs in your browser

Local processing

Current timestamp—s—ms

Timestamp → Date

Enter a value to convert.

The date is interpreted in your local timezone.

Enter a value to convert.

1
Read the live current timestamp at the top for a quick copy.
2
Type a timestamp on the left — the unit is detected automatically, or pick seconds/milliseconds.
3
Read the local, UTC and ISO dates on the right.
4
To go the other way, choose a date and time in the lower panel to get both timestamp units.

Input

1700000000

Output

2023-11-14 22:13:20 UTC

Input

1700000000000

Output

2023-11-14 22:13:20 UTC

How do I tell seconds from milliseconds?

Second timestamps have 10 digits today, millisecond timestamps have 13. Values with 12 or more digits are treated as milliseconds in auto mode.

Why does the local date differ from UTC?

The same instant looks different in each timezone. Both rows describe the same moment; only the offset changes.

What range can be converted?

Anything JavaScript dates support: roughly from the year 1 to the year 275760, far beyond practical use.