Unix Timestamp Converter — Epoch to Date & Back (Online)

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How to use the Timestamp

Watch the live current Unix time at the top, in seconds and milliseconds.

Enter an epoch value in Epoch → Date — seconds, milliseconds, microseconds or nanoseconds are auto-detected.

Or type a date in Date → Epoch (or the word now) to get its timestamp.

Use Use current time to fill both fields with the present moment.

Privacy: this tool runs entirely in your browser. Your input is never sent to, received by, or stored on any server — there are no uploads and no tracking of what you enter.

About Timestamp

What is a Unix timestamp?

A Unix timestamp (epoch time, POSIX time) is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970, ignoring leap seconds. It's a single integer with no time zone, which makes it the standard way computers store moments in time.

Seconds vs. milliseconds

Classic Unix time is in seconds (a 10-digit number around now). JavaScript and many APIs use milliseconds (13 digits). This converter detects 13+ digit numbers as milliseconds automatically.

Time zones

Epoch values are always UTC. This tool shows both the UTC string and your local time so you can see the offset applied by your browser's time zone.

Frequently asked questions

What is the current Unix timestamp?

Click "Use current time" to fill in the live epoch value for right now, in both seconds and milliseconds.

Why is my date off by several hours?

You're probably comparing a UTC value with a local time. Epoch is UTC; the "Local" line applies your browser's time-zone offset.

What date formats can I paste?

ISO 8601 (e.g. 2025-06-02T14:22:23Z), YYYY-MM-DD HH:MM:SS, and most formats your browser's Date parser understands.

What is the Year 2038 problem?

Systems storing epoch time in a signed 32-bit integer overflow on 19 January 2038. Modern 64-bit timestamps avoid this. This tool uses 64-bit JavaScript numbers.

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