What does a Unix timestamp represent?
A Unix timestamp shows the elapsed time since the 1970-01-01 UTC epoch as a number.
Having one time format makes logs, API responses, and system comparisons easier to reason about.
Unix Timestamp Converter
Convert dates to Unix seconds or milliseconds, or turn a timestamp back into a readable date.
Unix Timestamp Converter
Convert between dates and Unix seconds/milliseconds entirely in the browser.
Date and time
Date
A Unix timestamp counts the time elapsed since 1970-01-01 00:00:00 UTC.
The browser time zone is used.
Results update instantly.
Unix timestamp
Seconds
1777670040
Milliseconds
1777670040000
ISO
2026-05-01T21:14:00.000Z
Local view
Friday, May 1, 2026 at 9:14:00 PM
Browser time zone
UTC
Date and time
2026-05-01T21:14
Outputs are calculated automatically.
A Unix timestamp counts the time elapsed since 1970-01-01 00:00:00 UTC.
Share this calculation
The link keeps basic share tracking.
Should I use seconds or milliseconds?
Many systems use second-based timestamps, while some APIs expect millisecond precision.
This tool shows both so you can quickly confirm which unit a workflow requires.
Why does the time zone matter?
The same Unix value can display differently in different local time zones.
That is why the local date, ISO string, and numeric timestamp should be read together.
How is it used for logs and APIs?
Converting a timestamp from an error log into a readable date helps you understand event order faster.
For API integrations, checking seconds versus milliseconds helps avoid incorrect date windows.
UTC versus local time
UTC provides a shared system reference, while local time renders the value for a user's region.
This tool helps interpret time values, but it does not replace the time zone policy in your application code.
Limits and verification notes
Very old or far-future dates can behave differently across platforms because date ranges are not always identical.
For critical reporting, billing, or legal records, verify the result against the source system and official record.