Timestamp Converter

Convert Unix epoch time to readable dates and back — with the current time always in view.

Current Unix time

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Updates live. Unix time is seconds since Jan 1, 1970 UTC.

Unix timestamp seconds or ms

Date & time local time

How to Use This Converter

Type a Unix timestamp to get its date, or pick a date to get its timestamp. Both directions work in seconds and milliseconds.

Timestamps with 13 digits are milliseconds; 10 digits are seconds — this tool auto-detects.
All outputs use your local timezone unless noted.

Why is 1970 the epoch?

The original Unix systems chose January 1, 1970 as the starting point for time counting — an arbitrary but universal reference.

Seconds or milliseconds?

Unix time is normally seconds. JavaScript's Date uses milliseconds. This tool detects which you entered by the digit count.

Why does the date differ from another converter?

Check your timezone setting. The same timestamp shows different clock times in different zones — the UTC value is the same.

What happens in 2038?

32-bit signed systems overflow on January 19, 2038. 64-bit systems are safe for billions of years.

Enter 1700000000 (10 digits — seconds):

Result: November 14, 2023 at 22:13:20 UTC.
Enter the 13-digit 1700000000000 and you get the same instant, interpreted as milliseconds.

Unix timestamp — the number of seconds (or milliseconds) since midnight UTC on January 1, 1970.
Local date — the same instant shown in your timezone; the UTC value is identical for everyone.
Milliseconds — 13-digit values are milliseconds (used by JavaScript's Date); 10 digits are seconds. This tool auto-detects.