Unix Timestamp Converter

Convert Unix timestamps to readable dates, and dates back to timestamps, across time zones. ? Paste a timestamp in seconds, milliseconds, microseconds or nanoseconds; the unit is detected automatically. See the date in UTC, your own time zone and any other zones you add, or pick a date, time and zone to get its Unix timestamp.

How to convert a timestamp to a date

1. Paste the timestamp into Unix timestamp, or select Use current time.
2. Keep Detect automatically, or choose the unit if you know it.
3. Read the date in UTC, in your time zone, and in each zone in the list.

Add zones with Add a time zone, and remove them with ×. Your list of zones is remembered on this device.

How to convert a date to a timestamp

1. Under Date to timestamp, choose the date and time.
2. Choose the time zone the date and time are in. Your own zone is selected by default.
3. Copy the Unix timestamp in seconds, or use the milliseconds or ISO 8601 value.

When clocks change for daylight saving time, some local times are skipped and others happen twice. The tool tells you when this happens and which moment it used.

What is Unix time?

Unix time, also called epoch time or POSIX time, counts the seconds since 1 January 1970 00:00:00 UTC, the Unix epoch. For example, 1700000000 is 14 November 2023, 22:13:20 UTC. A Unix timestamp is the same everywhere in the world; only its display depends on the time zone.

Unix time ignores leap seconds: every day has exactly 86,400 seconds. Dates before 1970 have negative timestamps.

Seconds, milliseconds, microseconds or nanoseconds?

The tool detects the unit from the number of digits: up to 11 digits are read as seconds, up to 14 as milliseconds, up to 17 as microseconds, and longer numbers as nanoseconds.

Get the current Unix timestamp in code

date +%s                 # Linux and macOS, seconds
date -d @1700000000      # Linux: timestamp to date
date -r 1700000000       # macOS: timestamp to date

Math.floor(Date.now() / 1000);                  // JavaScript, seconds
new Date(1700000000 * 1000).toISOString();      // "2023-11-14T22:13:20.000Z"

import time, datetime
int(time.time())                                                   # seconds
datetime.datetime.fromtimestamp(1700000000, datetime.timezone.utc)  # timestamp to date

SELECT EXTRACT(EPOCH FROM now());   -- PostgreSQL
SELECT UNIX_TIMESTAMP();            -- MySQL

The year 2038 problem

Systems that store Unix time as a signed 32-bit integer can only count up to 2147483647, which is 19 January 2038, 03:14:07 UTC. One second later, the value overflows to a negative number and the date jumps back to 1901. Modern systems use 64-bit timestamps, which last for billions of years, but old embedded devices, file formats and databases can still be affected.

Frequently asked questions

Related tools

• JSON formatter and validator — Format API responses that contain timestamps.
• JWT encoder and decoder — Decode tokens whose exp and iat claims are Unix timestamps.
• UUID generator — Generate UUIDs, including time-based version 1.

Further reading

• POSIX — Seconds Since the Epoch
• IANA Time Zone Database
• MDN — Date

Last updated: 4 November 2026