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Unix Timestamp Converter

The Unix Timestamp Converter works both ways in one field: enter a number like 1759460000 and it detects whether it is seconds, milliseconds, microseconds or nanoseconds and shows the date; enter a date like 2026-10-03 12:00 and it returns Unix seconds and milliseconds. Pick a time zone (UTC, New York, London, Tokyo and more) and see ISO 8601 and relative time.

  • Free
  • No sign-up
  • Runs in your browser
Options
Result
The result will appear here
Results appear as you type

How to use the Unix Timestamp Converter

  1. Enter a timestamp (e.g. 1759460000) or a date and time (e.g. 2026-10-03 12:00).
  2. Choose the time zone to display or interpret the date in — your local zone by default.
  3. The date, Unix seconds, milliseconds and ISO 8601 appear instantly.
  4. Press "Now" for the current timestamp, or "Copy" to copy the seconds.

Examples

Seconds to UTC

Input
1759460000 (time zone: UTC)
Output
Friday, October 3, 2025 at 2:53:20 AM UTC
ISO 8601: 2025-10-03T02:53:20.000Z

Date to Unix timestamp

Input
2026-01-01 00:00 (time zone: UTC)
Output
Seconds: 1767225600
Milliseconds: 1767225600000

What is a Unix timestamp?

A Unix timestamp (epoch time) is the number of seconds since 00:00:00 UTC on January 1, 1970. It is independent of time zones, which is why databases, APIs and logs use it. JavaScript's Date.now() and Java's System.currentTimeMillis() return milliseconds, so they have three extra digits.

Signed 32-bit timestamps overflow on January 19, 2038 (the Year 2038 problem); modern systems use 64-bit values.

Specs & key facts

Auto-detection10 digits = seconds, 13 = milliseconds, 16 = microseconds, 19 = nanoseconds
Date inputYYYY-MM-DD, YYYY/MM/DD HH:mm(:ss), ISO 8601, RFC 2822
Time zonesLocal, UTC, Taipei, Tokyo, Hong Kong, Shanghai, Seoul, New York, Los Angeles, London, Berlin
OutputLocal date and time, Unix seconds/milliseconds, ISO 8601, RFC 2822, relative time, day of year
ProcessingIn your browser
PriceFree, no sign-up

FAQ

How do I know if a timestamp is in seconds or milliseconds?

Count the digits: current times are 10 digits in seconds and 13 in milliseconds. The tool detects it and shows the unit under "Detected unit".

Why is the converted time off by several hours?

Unix timestamps are UTC. Choose your time zone in the tool, and make sure your code converts to local time when displaying.

Which time zone is used for the date I type?

A date without a zone (e.g. 2026-10-03 12:00) is read in the selected time zone; ISO 8601 strings with Z or +09:00 use the zone in the string.

What does a negative timestamp mean?

A time before 1970 — for example −86400 is December 31, 1969.