The current Unix time

live

Seconds

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Milliseconds

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Enter a Unix timestamp in any unit, or paste a date in almost any format. Examples:

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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 calculates every unit exactly, so 19-digit nanosecond values from logs round-trip digit for digit.

Any time zone, DST-aware

Compare several zones side by side. Times skipped or repeated by a clock change are flagged, with both answers shown.

Paste any date format

ISO 8601, RFC 2822, log dates, Excel serials, Windows FILETIME, .NET ticks, GPS and Apple time, with the match named.

Arithmetic and countdowns

Add or subtract time, compare two timestamps and count down to any moment, such as the Year 2038 limit.

Batch conversion

Paste a column of values or whole log lines, add a zone column and download a CSV.

Private & client-side

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

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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 shows your local time, UTC, any other zones you add, ISO 8601, RFC 2822 and a relative time like "3 hours ago" that keeps updating.
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 pick the unit yourself. Every unit is calculated exactly, so a 19-digit nanosecond value from a log comes back digit for digit.
Can I paste a date instead of a number?
Yes. The same box reads ISO 8601 and RFC 3339 (with an offset, Z or a zone name like [Europe/Berlin]), RFC 2822 email and HTTP dates, JavaScript date strings, Apache and nginx log dates, syslog dates and "Jan 2, 2024 3:04 PM". It says which format it matched. Pick a format to read Excel serial dates, Windows FILETIME / LDAP, .NET ticks, Chrome/WebKit time, Apple Cocoa or HFS+ seconds and GPS seconds; when a plain number looks like one of those, it suggests it.
How do I convert a date back to a Unix timestamp?
Use the Date → Timestamp box: pick the date and time (with up to nine digits of a second), choose the time zone the wall-clock time is written in, and read off epoch seconds, milliseconds, microseconds, nanoseconds, hex and ISO 8601.
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) and 45-minute zones like Chatham (+12:45) are handled. When a time doesn't exist (the clocks jumped forward) or happens twice (the clocks went back), the tool says so and shows both possible answers to pick from. You can also compare several zones side by side.
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 and paste one value per line, or whole log lines: the timestamps inside them are found and converted. You get a table with a time-zone column of your choice, a CSV download, a TSV copy, and the original text with an ISO date added after each timestamp. You can also open or drop a file.
Can I add or subtract time?
Yes. Add or subtract years, months, weeks, days, hours, minutes, seconds or milliseconds, see the difference between two timestamps, and see how long until (or since) any moment. The Year 2038 limit is one click away, and a future moment can be opened as a countdown in the Timer.
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.

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