Dev Tool

Unix Timestamp Converter

Convert Unix timestamps to dates and dates to timestamps. Supports seconds, milliseconds and multiple timezone formats.

⏱ Current Unix Timestamp Loading…

Seconds

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Milliseconds

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🔢 Timestamp → Human Date

Enter a timestamp above

📅 Date → Timestamp

Date & Time

Unix Timestamp

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Frequently Asked Questions

How do I convert a timestamp to a date?

Paste the Unix timestamp into the converter and it instantly shows the human-readable date and time in your local timezone and UTC.

Does it support milliseconds?

Yes, the converter supports both second and millisecond precision Unix timestamps and auto-detects which format you are using.

How do I convert a date to a Unix timestamp?

Enter the date and time into the converter and click Convert to get the Unix timestamp in seconds. You can also choose millisecond output for JavaScript applications.

What timezone does the converter use?

The converter displays results in both UTC and your local browser timezone. You can convert any timestamp to any timezone using the timezone selector.

What is a Unix timestamp?

A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since January 1, 1970 at 00:00:00 UTC. It is the most common way to represent time in programming and APIs.

How do I know if a timestamp is in seconds or milliseconds?

Timestamps in seconds are typically 10 digits (e.g. 1700000000). Timestamps in milliseconds are 13 digits (e.g. 1700000000000). This tool automatically detects which format you are using.

Why is 1970 used as the epoch?

January 1, 1970 was chosen as the Unix epoch by early Unix developers in the late 1960s as a convenient reference point. It had no particular technical significance — it was simply round and recent.

What a Unix timestamp is

A Unix timestamp counts the seconds since 1 January 1970 at 00:00 UTC. Servers, databases, APIs and log files use it because a single number means the same moment everywhere, with no time zones or date formats to get wrong. This converter turns timestamps into readable dates and back, in seconds, milliseconds or ISO 8601 format.

Seconds or milliseconds?

10 digits, like 1790000000, are seconds. Unix tools, PHP and most databases use these.
13 digits, like 1790000000000, are milliseconds. JavaScript's Date.now() and Java use these.

If a date comes out in 1970, or thousands of years in the future, the two have been mixed up.

Time zones

A timestamp is always UTC; the time zone only matters when you display it. Store UTC and convert at the last moment. ISO 8601 makes the offset explicit: 2026-09-30T14:00:00Z is UTC, and 2026-09-30T16:00:00+02:00 is the same moment in Central European Summer Time.

Common pitfalls

Daylight saving time. Local times can be skipped or repeated when the clocks change; UTC never is.
The year 2038 problem. Systems that store seconds in a signed 32-bit number overflow on 19 January 2038. Use 64-bit integers in new code.
Logs from several servers. Convert every timestamp to UTC before comparing them.

To schedule jobs at fixed times, the cron job generator builds the expression for you.