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Unix Timestamp Converter — Epoch to Date

Convert Unix timestamps (seconds, milliseconds, micro or nanoseconds) to readable dates in UTC and any time zone, or convert a date back to epoch time.

Timestamp or date

Output

Ready

Runs locally in your browser — your data is never uploaded.

About the Unix Timestamp Converter

Convert Unix timestamps (seconds since 1 January 1970 UTC) into human-readable dates, or dates back into timestamps. The converter detects whether a number is in seconds, milliseconds, microseconds or nanoseconds and shows the result in UTC, ISO 8601, RFC 2822 and any time zone you choose.

Leave the input empty to see the current timestamp. Relative time, day of year and ISO week number are included too.

How to use it

  1. Paste a timestamp or a date string.
  2. Pick a time zone.
  3. Copy the format you need.

Features

  • Auto-detects s / ms / µs / ns
  • Any IANA time zone
  • ISO 8601, RFC 2822 and relative time
  • Date → timestamp

Frequently asked questions

What is a Unix timestamp?

The number of seconds since 00:00:00 UTC on 1 January 1970 (the Unix epoch), not counting leap seconds. JavaScript's Date.now() returns milliseconds instead.

What is the year 2038 problem?

Signed 32-bit timestamps overflow on 19 January 2038. Modern systems use 64-bit integers, which last for billions of years.

Is my data uploaded anywhere?

No. All processing happens in JavaScript inside your browser tab. Your input is never sent to a server, logged or stored, so it is safe to use with internal or sensitive data.