Interpreted as UTC. Format: 2026-06-15T12:30:00
Unix time counts the seconds since 1 January 1970 (UTC), ignoring leap seconds. Signed 32-bit systems overflow on 19 January 2038 — the dashed marker — which is why modern systems use 64-bit time. All conversion is done locally in your browser.
How to convert epoch time
To read a timestamp, paste it into Timestamp → date; the unit is detected automatically (10 digits = seconds, 13 = milliseconds) and you get the ISO-8601, full UTC and a relative (“2 days ago”) value. To go the other way, enter a UTC date and time in Date → timestamp and copy the seconds or milliseconds. The banner at the top shows the current Unix time, ticking live.
Where epoch time shows up
Database created_at columns, log lines, JWT iat/exp claims, cookie expiries, cron scheduling and API rate-limit headers all use epoch time. Converting it to a human, timezone-free instant is one of the most common day-to-day developer and sysadmin tasks — which is why we keep it fast and accurate.
🔐 In-browser: nothing is uploaded. Need help with logging, monitoring or infrastructure? Servnet supports UK businesses since 2001.
Unix time — common questions
What is a Unix timestamp?
A Unix (or epoch) timestamp is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970, not counting leap seconds. It is a compact, timezone-free way to store an instant in time, used across databases, logs and APIs.
Seconds or milliseconds — how do I tell?
A 10-digit number is almost always seconds; a 13-digit number is milliseconds. This converter auto-detects by length (and also supports microseconds and nanoseconds), and you can force seconds or milliseconds if you prefer.
How do I convert a date to a Unix timestamp?
Type the date and time in the “Date → timestamp” box using the format YYYY-MM-DDTHH:mm:ss. It is interpreted as UTC, and you get both the seconds and milliseconds values to copy.
What is the year 2038 problem?
Systems that store Unix time in a signed 32-bit integer overflow at 03:14:07 UTC on 19 January 2038 (the dashed marker on the timeline). Modern 64-bit systems avoid this, but legacy code and embedded devices can still be affected.
Why is everything shown in UTC?
Unix time is inherently UTC-based, and showing UTC avoids ambiguity from timezones and daylight saving. The ISO-8601 value ends in “Z”, meaning Zulu/UTC.
Does this run offline / privately?
Yes. All conversion is pure JavaScript in your browser; no timestamps are sent anywhere.