Unix Timestamp Converter

About this Unix timestamp converter

This free online tool turns Unix timestamps into a readable date – and a date back into a timestamp. It is useful for developers checking values from logs, databases or APIs, as well as anyone who quickly wants to understand a Unix time. All calculations run locally in your browser only – no data is transmitted.

What is a Unix timestamp?

A Unix timestamp (also Unix time or epoch time) is the number of seconds – or milliseconds – since 1 January 1970, 00:00:00 UTC. So a single number like 1672531200 describes an exact moment, independent of the time zone. In milliseconds the same moment has 13 digits (1672531200000). This converter detects the unit automatically.

Features

• Conversion in both directions: timestamp ↔ date
• Second and millisecond timestamps with automatic detection
• Date entry via individual fields or as text with format detection (DD.MM.YYYY, MM/DD/YYYY, YYYY-MM-DD, ISO 8601)
• Time zone selection including a shortcut for the system time zone
• Calculate with time spans from seconds to years
• Human-readable display of the moment, accurate to the second
• Paste from and copy to the clipboard
• Light and dark mode (follows the system setting if you wish)

How to use it

Convert a Unix timestamp into a date

1. Enter the timestamp into the Unix timestamp field or take it from the clipboard with Paste.
2. The date, time and the readable description appear instantly. Seconds or milliseconds are detected automatically.
3. If needed, pick the time zone – the display recalculates while the moment stays the same.

Convert a date into a timestamp

1. Fill in the day, month, year and time fields – or enter the date in the Date as text field.
2. The matching Unix timestamp is calculated continuously.
3. Use Timestamp with milliseconds to switch between seconds and milliseconds and take the result with Copy.

Current time and round moments

1. Use Now to insert the current moment.
2. Use the selector next to it to instead choose start of day, end of day, start of year or end of year.

Calculate with moments

1. In the Calculate area, enter an amount and choose a unit (seconds to years).
2. Add with + or subtract with −; all displays update.

Frequently asked questions

How do I convert a Unix timestamp into a date?

Enter or paste the timestamp into the “Unix timestamp” field. The converter automatically detects whether it is seconds or milliseconds and immediately shows the date, time and a readable description.

Does the converter support milliseconds?

Yes. The unit is detected automatically from the magnitude, and the “Timestamp with milliseconds” option lets you switch the output between seconds and milliseconds.

Which time zones are supported?

All time zones known to the browser (IANA database). One click adopts the current system time zone.

Is my data transmitted?

No. All calculations run locally in your browser only. No input is sent to a server.