Unix Timestamp Converter

Computers love counting seconds since 1 January 1970; humans do not. When a log file, API or database shows you a number like 1760000000, you need a translator. Our free Unix timestamp converter works in both directions: turn an epoch timestamp (seconds or milliseconds) into a clear UTC and local date, or pick any date and time to get its timestamp. A live clock shows the current epoch second ticking by, which is invaluable when you are testing time-sensitive code.

Quick Answer: Enter a Unix timestamp to see its UTC and local date, or pick a date and time to generate its timestamp in seconds or milliseconds. The current epoch time updates live at the top.

Free Online Tool

Current epoch time: … (updates every second)

Timestamp (seconds or milliseconds)

Or pick a date & time (your local time)

Table of Contents

How to Use the Unix Timestamp Converter

To decode a timestamp, paste it into the timestamp field; the tool detects whether it is in seconds or milliseconds.
Read the converted date in both UTC and your local timezone beneath the field.
To create a timestamp, use the date and time picker in the second panel.
Choose seconds or milliseconds output to match what your system expects.
Copy the value you need into your code, query or log analysis.

Key Features

Automatic detection of seconds versus milliseconds based on the number’s size.
Shows UTC and your local timezone side by side to end timezone confusion.
Live current timestamp display updating every second.
Supports dates before 1970 (negative timestamps) and far-future dates.
Relative output such as ‘3 hours ago’ for quick log reading.

Best Practices and Tips

When a converted date lands in 1970 or the year 56000, you have mixed up seconds and milliseconds; the detector here prevents most of those cases.
Always agree on UTC in distributed systems and convert to local time only for display; most timestamp bugs are really timezone bugs.
Remember JavaScript’s Date uses milliseconds while PHP’s time() uses seconds; keep this converter open when moving values between them.
For database columns, prefer storing the raw timestamp and formatting in the application layer, so sorts and ranges stay accurate.

Common Mistakes to Avoid

Assuming every 10-digit number is a timestamp; order IDs and phone numbers get ‘converted’ by mistake more often than you would think.
Forgetting daylight saving time when converting by hand; the converter uses your browser’s real timezone rules, so trust it over mental arithmetic.
Rounding millisecond timestamps to seconds in logs and then wondering why event ordering looks wrong.

Frequently Asked Questions

What exactly is a Unix timestamp?

It is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970, an instant called the Unix epoch. Millisecond timestamps simply count thousandths of a second over the same period, making them 1000 times larger.

How can I tell if a timestamp is seconds or milliseconds?

Current timestamps in seconds have 10 digits; in milliseconds they have 13. This tool inspects the magnitude automatically, but knowing the digit rule helps you spot errors in other systems.

What is the year 2038 problem?

Old 32-bit systems store timestamps in a signed 32-bit integer, which overflows on 19 January 2038 and wraps to 1901. Modern 64-bit systems are unaffected for billions of years, but embedded and legacy systems still need attention.

Why does my timestamp show a different time than expected?

Almost always a timezone difference. The timestamp itself is timezone-neutral (it is always UTC-based); the displayed time depends on the viewer’s timezone, which is why this tool shows both UTC and your local reading.

Can I convert a date before 1970?

Yes. Dates before the epoch produce negative timestamps, and the converter handles them, which is useful for birth dates and historical data.