Omnibus

The current Unix time

live

Seconds

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Milliseconds

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Enter a Unix timestamp above to see it as a human-readable date.

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Convert Unix timestamps to dates and back

Free, no sign-up, no credit card, no trial. Nothing you enter leaves the browser — convert epoch time to a human-readable date and back, in seconds, milliseconds, microseconds or nanoseconds, in any time zone, with the live current timestamp and batch conversion.

Seconds to nanoseconds

Auto-detects the unit and preserves full precision — even 19-digit nanosecond values that overflow plain JavaScript numbers.

Any time zone, DST-aware

Read or write a time in any IANA zone, with correct daylight-saving, half-hour and 45-minute offsets.

Batch conversion

Paste a whole column of timestamps and copy the results back as TSV or CSV.

Private & client-side

Everything runs in your browser. No sign-up, nothing uploaded, no watermark.

What is Unix / epoch time?

Unix time counts the seconds that have elapsed since 1970-01-01 00:00:00 UTC, a moment known as the Unix epoch. Leap seconds are ignored, so the count maps cleanly to a wall-clock date. Because it is anchored to UTC, one timestamp names the same instant everywhere — the time zone only affects how you present it.

Many systems report time in milliseconds (JavaScript’s Date.now()), and databases and tracing tools often use microseconds or nanoseconds. This tool detects the unit from the magnitude of the number and keeps every digit, so a nanosecond value never loses precision.

A well-known limit is the Year 2038 problem: a signed 32-bit timestamp can only reach 2147483647 seconds — 03:14:07 UTC on 19 January 2038 — before it overflows. Modern software stores time in 64-bit integers to sidestep it.

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Frequently asked questions

What is a Unix timestamp?
A Unix timestamp is the number of seconds elapsed since 1970-01-01 00:00:00 UTC (the Unix epoch), not counting leap seconds. Because it's measured from a fixed point in UTC, the same timestamp refers to the same instant everywhere in the world — the time zone only matters when you display it.
How do I convert a Unix timestamp to a date?
Paste the timestamp into the Timestamp → Date box. The tool auto-detects whether it's in seconds, milliseconds, microseconds or nanoseconds and instantly shows your local time, UTC, ISO 8601, RFC 2822 and a relative time like "3 hours ago".
Seconds, milliseconds, microseconds or nanoseconds — how does it know?
By the number of digits: a ~10-digit value is seconds, ~13 is milliseconds, ~16 is microseconds and ~19 is nanoseconds. Detection is automatic, but you can override the unit if a value is ambiguous.
How do I convert a date back to a Unix timestamp?
Use the Date → Timestamp box: pick the date and time, choose the time zone the wall-clock time is written in, and read off epoch seconds, milliseconds, microseconds, nanoseconds and ISO 8601 — with correct daylight-saving and half-hour offsets.
Does it handle time zones and daylight saving time?
Yes. Conversions use your browser's IANA time-zone database, so half-hour zones like India (+05:30), 45-minute zones like Chatham (+12:45) and daylight-saving transitions are all handled correctly. You can display any timestamp in any time zone.
What is the Year 2038 problem?
Systems that store Unix time in a signed 32-bit integer can only count up to 2,147,483,647 seconds, which is reached at 03:14:07 UTC on 19 January 2038. After that the value overflows to a negative number. The fix is to use 64-bit timestamps, which are effectively unbounded.
Can I convert many timestamps at once?
Yes. Switch to Batch mode, paste one timestamp per line, and get a table of UTC, local, ISO and relative times that you can copy as TSV or CSV — handy for cleaning up log files.
Is anything sent to a server?
No. Every conversion runs entirely in your browser — nothing is uploaded or stored. It's free with no sign-up; a single unobtrusive ad slot covers hosting.

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