Unix timestamp converter — Epoch ↔ KST

Instantly see what time a number like 1735689600 from a log or database corresponds to in KST. Also shows the current timestamp live.

The file is never sent to a server — processed entirely in this browser

Current Unix time (seconds) —

Timestamp → date

Timestamp

Date → timestamp

Date and time

Reference time zone

Korea Standard Time (KST) is UTC+9 and doesn't observe daylight saving time. The unit is determined by digit count: around 10 digits for seconds, 13 for milliseconds, 16 for microseconds, 19 for nanoseconds.

How to use Convert timestamp

1Paste a timestamp and it automatically detects seconds or milliseconds and converts it to a date.
2Check KST, UTC, ISO 8601, and relative time (e.g. 3 hours ago).
3Conversely, choosing a date and time zone gives you the timestamp.

Frequently asked questions

How do I tell seconds from milliseconds?

Around 10 digits means seconds, 13 digits means milliseconds (JavaScript's Date.now() uses milliseconds). 16-digit microseconds and 19-digit nanoseconds are recognized too.

How many hours ahead of UTC is Korea time?

Korea Standard Time (KST) is 9 hours ahead of UTC and doesn't observe daylight saving time.