FREE UNIX TIMESTAMP CONVERTER

Free Unix Timestamp Converter

Convert Unix timestamps and date-times in either direction using seconds or milliseconds.

Inputs and results are never uploaded or stored.

  1. 1Enter a value
  2. 2Convert in browser
  3. 3Use results

FREE UNIX TIMESTAMP CONVERTER

Current Unix timestamp

Updates every second from your device clock.

Timestamp in seconds—
Timestamp in milliseconds—

1 · Enter a value

Timestamp → date

Converted on your device

Enter an integer and choose its exact unit.

Input unit

1 · Enter a value

Date → timestamp

Interpret the date in your device time zone or UTC.

Time basis

3 · Use results

Conversion result

Seconds, milliseconds, UTC, and local time will appear here.

FREE TIMESTAMP CONVERTER GUIDE

Convert Unix timestamps and dates for free in your browser

Explicit units and time bases keep conversions predictable.
1

Choose a direction

Convert a timestamp to a date or a date to a timestamp.

2

Confirm unit and basis

Choose seconds or milliseconds, and device time or UTC.

3

Use the result

Copy UTC or local values or download a TXT file.

EPOCH, UTC, AND LOCAL TIME

See the same instant in several time formats

Understanding units and zones prevents incorrect conversions.

Seconds and milliseconds

Choose the unit explicitly instead of relying on digit-length guesses.

UTC and device time

Compare universal UTC with the current device time zone.

2038 and DST

Negative and post-2038 values work; skipped DST times return an error.

FREE UNIX TIMESTAMP CONVERTER FAQ

Timestamp converter FAQ

Learn about free use, units, UTC, and negative timestamps.
1Is this timestamp converter free?

Yes. It is free without usage limits, and all values stay in the current browser.

2Does it detect seconds and milliseconds automatically?

No. A digit-length guess can misread old or far-future values, so you choose the unit.

3Why are UTC and device time different?

UTC is the shared global reference; device time uses your operating system time zone and historical DST rules.

4Can it convert negative timestamps before 1970?

Yes, within the range supported by ECMAScript Date.