Timestamp Converter
Convert between Unix time and dates.
Your files stay on your device
This tool processes everything locally in your browser. Nothing is uploaded to a server.
📝 About Timestamp Converter
A Unix timestamp counts the seconds that have passed since 00:00:00 UTC on January 1, 1970, ignoring leap seconds. It is the time format of choice for databases, log files, APIs and JWT expiry fields because it is a single number with no time zone ambiguity. The trouble is that a value like 1700000000 means nothing at a glance.
This converter works in both directions. Enter a timestamp in seconds and it shows the matching moment in UTC and in your browser’s local time zone. Or pick a date and time with the date picker, interpreted as your local time, and it returns the corresponding Unix timestamp in seconds, ready to copy.
Watch out for milliseconds: JavaScript and many web APIs use 13-digit millisecond timestamps, while this tool expects 10-digit seconds, so divide by 1,000 first. Also note that conversions rely on your device’s clock settings and time zone. Everything is calculated locally in your browser.
📘 How to use
- 1
Convert a timestamp
Type a Unix timestamp in seconds and press → Date to see it in UTC and local time.
- 2
Convert a date
Pick a date and time in the Date & time field and press → Timestamp.
- 3
Copy the value
Use the copy button next to the result to paste the timestamp into your code or query.
❓ FAQ
My timestamp has 13 digits. What should I do?
That is a millisecond timestamp. Divide it by 1,000 (or drop the last three digits) before entering it, because this tool expects seconds.
Which time zone is used for the date picker?
The date and time you pick are interpreted in your browser’s local time zone, then converted to a UTC-based Unix timestamp.
Can I convert dates before 1970?
Yes. Dates before the Unix epoch are represented as negative timestamps, and you can also enter a negative number to convert it back.
What is the Year 2038 problem?
Systems that store Unix time as a signed 32-bit integer overflow on January 19, 2038. Modern 64-bit systems and JavaScript are not affected.