Paste a Unix timestamp (seconds or milliseconds) or a date string, then click Convert Timestamp. The result renders below - nothing leaves your browser.
Unix Timestamp Converter
Paste a Unix timestamp and read it as a normal date, or paste a date and get the Unix seconds and milliseconds back. The conversion is plain JavaScript running in your browser - nothing is sent to a server.
You do not need to know whether your value is in seconds or milliseconds: the unit is detected automatically from the digit count, so a 10-digit value like 1756800000 and a 13-digit value like 1756800000000 both work without picking a mode. Microsecond and nanosecond values from database exports are recognized the same way.
The output shows the same instant several ways at once: ISO 8601 UTC, your local time with its UTC offset, and a relative phrase such as "3 days ago". That makes it quick to sanity-check a log entry, an API response field, or a database row against wall-clock time.
If the input is not a timestamp or a date, the page shows a plain-language hint with working examples instead of an error dump, and the Copy Output button puts the formatted result on your clipboard for pasting into a ticket or a query.
Frequently Asked Questions
What does this Unix timestamp converter do?
It converts a pasted Unix timestamp into a readable date, and also works the other way: paste a date such as 2026-09-02T12:00:00Z and it returns the Unix seconds and milliseconds. Everything runs as plain JavaScript in your browser - nothing is sent to a server.
Do I have to say whether my timestamp is in seconds or milliseconds?
No. The unit is detected from the digit count: about 10 digits is read as seconds, 13 as milliseconds, and longer microsecond or nanosecond values from database exports are recognized the same way.
What formats does the output show?
The same instant is shown several ways at once: ISO 8601 UTC, your local time with its UTC offset, an RFC-style UTC string, and a relative phrase such as "3 days ago". A Copy Output button puts the whole result on your clipboard.
What happens if I paste something that is not a timestamp?
The page shows a plain-language hint with working examples - a 10-digit seconds value, a 13-digit milliseconds value, or an ISO date - instead of throwing an error.