Unix Timestamp Converter

Convert timestamps to human dates and back

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ToolUnix Timestamp Converter

Current Unix Timestamp

Timestamp to Date

Date to Timestamp

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About Unix Timestamp Converter

Unix timestamps count the seconds elapsed since the Unix epoch — midnight UTC on January 1, 1970. This simple integer representation is the backbone of time storage across databases, APIs, log files, and operating systems because it is timezone-agnostic, sortable, and takes only 4–8 bytes to store. Converting between raw timestamps and human-readable ISO 8601 dates is a daily task for backend developers and data analysts.

How it works

When you enter a timestamp, the tool passes it to JavaScript's Date constructor. If the number has more than 10 digits, it is treated as milliseconds; 10 digits or fewer are treated as seconds and multiplied by 1000 before being passed to Date. The resulting Date object is then formatted using the Intl.DateTimeFormat API with your browser's detected locale and time zone.

For the reverse direction — converting a human date to a Unix timestamp — the tool parses the entered date string using the native Date.parse() method, then divides the millisecond result by 1000 and floors it to produce a seconds-precision Unix timestamp.

The live clock updates every second using setInterval, reading Date.now() on each tick. Relative time labels ("2 hours ago", "in 3 days") are computed by comparing the target timestamp to the current timestamp and bucketing the difference into the appropriate time unit.

Who this is for

A backend developer debugging an API response where a created_at field shows 1711497000 and needs to quickly confirm whether that date falls within the expected window.

A data analyst converting a column of Unix timestamps exported from a MySQL database into readable dates for a business report.

A DevOps engineer cross-checking server log timestamps in epoch seconds against a deployment event time to pinpoint when an error started.

A mobile developer converting an event start_time returned from a REST API into a display string in the user's local time zone.

Scope note: The tool relies on the browser's Intl API for locale-aware formatting, so output may vary slightly across different operating systems and browser versions. Dates before the Unix epoch (pre-1970) use negative timestamps; support is generally correct but some edge cases around historical DST transitions may not be perfectly accurate.

How to use it

1
See the current Unix timestamp updating live
2
Enter a timestamp to convert to a human-readable date
3
Or pick a date and time to get the Unix timestamp
4
Choose your preferred date format from the options

Frequently asked questions

What is a Unix timestamp?

The number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC (the Unix epoch). It is widely used in programming and databases.

Does it handle milliseconds?

Yes. The tool auto-detects whether the input is in seconds or milliseconds and converts accordingly.

What date formats does the converter output?

The tool outputs dates in several common formats including ISO 8601 (2024-03-15T14:30:00Z), locale-aware long format (March 15, 2024, 2:30 PM), and short numeric format. It also shows the day of the week and relative time (e.g., "3 days ago").

What happens after the Year 2038 problem?

The Year 2038 problem affects 32-bit signed integer timestamps, which overflow on January 19, 2038. This tool uses JavaScript's 64-bit floating-point numbers (Date object), which can safely represent dates up to the year 275,760 — so no overflow occurs here.

How do I get the current Unix timestamp in different programming languages?

JavaScript: Math.floor(Date.now() / 1000). Python: import time; int(time.time()). PHP: time(). Java: System.currentTimeMillis() / 1000L. Go: time.Now().Unix(). The live clock on this page shows the current timestamp updating in real time.

Does the converter adjust for my local time zone?

Yes. The tool uses your browser's local time zone (via the Intl API) for display, and also shows the UTC equivalent. When you enter a date and time, it assumes your local time zone unless you explicitly type a UTC offset.