Free online timestamp converter
Timestamp Converter
Convert Unix timestamps in seconds or milliseconds into local time, UTC, and ISO strings.
Date Tools
Browser based
Runs on the current page
Copy-ready
Use the output where you work
No sign-in
Open the tool and get moving
Developer tool
Convert Timestamps
Translate Unix time into UTC, local time, ISO strings, seconds, and milliseconds.
UTC
Thu, 01 Jan 1970 00:00:00 GMT
Local
1/1/1970, 12:00:00 AM
ISO
1970-01-01T00:00:00.000Z
Milliseconds
0
Date input as timestamp
Seconds
Invalid
Milliseconds
Invalid
Built for the task
Age, dates, weekdays, and business-day answers.
Calculate age, date differences, weekdays, ISO weeks, business days, and Unix timestamps.
More tools
Continue with related date tools.
Age Calculator
Calculate exact age in years, months, and days with total days lived and next birthday countdown.
Date Calculator
Add or subtract calendar months, days, weeks, and years from any date and see the exact result, weekday, and ISO date.
Days Between Dates
Find the exact days, weeks, months, and years between two calendar dates.
Business Days Calculator
Count Monday to Friday business days between two dates and separate weekend days.
Day of Week Calculator
Find what day of the week any date falls on, plus day-of-year and ISO week details.
Week Number Calculator
Calculate the ISO week number, ISO week-year, weekday number, and weeks in the year.
FAQ
Timestamp Converter questions.
What is a Unix timestamp?
A Unix timestamp counts time from 1 January 1970 at 00:00:00 UTC, usually in seconds or milliseconds.
Does the local time depend on my device?
Yes. Local output uses your browser and operating system timezone settings.
Custom software