How to Use the Timestamp Converter

The top panel shows the current time as a live Unix timestamp — updated every second.
To convert a timestamp to a date: paste the number into the Unix Timestamp → Human Date field and select seconds or milliseconds.
Click the refresh icon to fill in the current time automatically.
To convert a date to a timestamp: use the Human Date → Unix Timestamp date/time picker.
Click any copy icon to copy a specific format to your clipboard.

Output Formats Explained

ISO 8601 — Standard international format: 2024-01-15T10:30:00.000Z. Always in UTC.
UTC — Human-readable UTC string: Mon, 15 Jan 2024 10:30:00 GMT.
Local — Date and time in your browser's local timezone.
Date only / Time only — The date or time portion alone in local format.
Unix (s) — Seconds since the Unix epoch (Jan 1, 1970 UTC).
Unix (ms) — Milliseconds since the Unix epoch. Used by JavaScript's Date.now().
Relative — Human-friendly relative time like "3 hours ago" or "in 2 days".

Frequently Asked Questions

What is a Unix timestamp?

A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC. It is the most widely used format for storing and transmitting dates in software systems.

Seconds vs milliseconds — how do I tell?

A 10-digit number is almost always in seconds (e.g. 1700000000). A 13-digit number is in milliseconds (e.g. 1700000000000). JavaScript's Date.now() returns milliseconds; most backend languages and databases default to seconds.

What is the Unix epoch?

The epoch is the reference point: January 1, 1970, 00:00:00 Coordinated Universal Time (UTC). All Unix timestamps are counted from this moment.

What is the Year 2038 problem?

32-bit signed integers can represent timestamps up to January 19, 2038. After that, the value overflows and wraps to 1901. Most modern systems use 64-bit integers, which can represent dates billions of years into the future.

Timestamp Converter