Unix Timestamp Converter

Free

Convert a Unix timestamp into a readable date in your local time zone, UTC, ISO 8601, and RFC 2822 formats (plus a relative time summary), or convert a date back into Unix seconds and milliseconds, with a live-updating current timestamp display, all running entirely in your browser.

Current Unix timestamp

Unix timestamp

Unit

Local time ()

UTC

ISO 8601

RFC 2822

Relative

Recent Activity

Visible to everyone. Last 20 uses across all visitors, newest first.

Converted date to timestamp 1700000000

1 hour ago

Converted timestamp 1791932746 to date

1 hour ago

Converted timestamp 1700000000 to date

1 hour ago

Converted timestamp 1700000000 to date

1 hour ago

Converted timestamp 1700000000000 to date

1 hour ago

Converted timestamp 1700000000000 to date

1 hour ago

Converted timestamp 1700000000 to date

1 hour ago

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What this tool does

This tool converts a Unix timestamp into a readable date and time in your local time zone, UTC, ISO 8601, and RFC 2822 formats, plus a relative "time ago" summary, and converts a date and time back into Unix seconds and milliseconds. A live-updating display always shows the current Unix timestamp.

How It Works

A Unix timestamp is simply a count of seconds (or milliseconds) since the Unix epoch. To convert it to a date, this tool multiplies a seconds-based value by 1,000 to get milliseconds, since that is the unit JavaScript's Date object expects, then reads the local time, UTC time, and standard string representations directly from that Date object. To convert a date back to a timestamp, it reads the date either as your browser's local time zone or as UTC, gets the underlying millisecond count, and divides by 1,000 for the seconds value.

Problems it solves

Reading a human date out of a Unix timestamp found in a log file, database row, or API response.
Generating the exact Unix timestamp for a specific date and time to use in a test, script, or query filter.
Checking whether a timestamp value is in seconds or milliseconds when the source system did not say.
Getting an ISO 8601 or RFC 2822 formatted date without looking up the exact formatting rules each time.

Frequently asked questions

›What is a Unix timestamp?

A Unix timestamp (also called Unix time or epoch time) is the number of seconds that have passed since midnight UTC on January 1, 1970, ignoring leap seconds; it is a single number that unambiguously represents one exact moment in time, independent of time zone or calendar.

›How can this tool tell seconds apart from milliseconds automatically?

Timestamps in seconds for dates in the last few decades are 10 digits long, while timestamps in milliseconds for the same dates are 13 digits long; this tool uses that size difference to auto-detect the unit by default, though you can force seconds or milliseconds explicitly if your value falls near the boundary.

›Why does the result show several different date formats?

Different systems expect different formats: log files and APIs often use ISO 8601, email headers and some legacy systems use RFC 2822, and a person reading the result usually wants their own local time or a quick "3 hours ago" style summary; this tool computes all of them at once instead of making you convert the same timestamp several times.

›Does converting a date back to a timestamp account for time zones?

Yes, you can choose whether the date and time you entered should be interpreted in your browser's local time zone or as UTC; the resulting Unix timestamp is always the same underlying moment in time regardless of which time zone you view it in afterward.

›Does this tool send my data anywhere?

No, every conversion is computed locally using your browser's own JavaScript Date object; nothing is ever uploaded to a server.

Convert text into its binary character codes and back again, with the result also shown in decimal, hexadecimal, and octal, all running entirely in your browser with nothing ever uploaded.