Timestamp Converter
Convert Unix timestamps into readable dates and back again.
Result
What is Timestamp Converter?
Timestamp Converter turns Unix timestamps into human-readable dates and converts dates back to timestamps — in both seconds and milliseconds. It auto-detects the format so you do not need to guess whether a 10-digit or 13-digit value was used, and shows the result in both UTC and your local timezone side by side.
Essential for debugging API responses, log files, database records, or any system that stores time as a number. No more manual epoch arithmetic — paste the value and get the answer instantly.
Common Use Cases
- Debugging API responses that return Unix timestamps
- Converting database-stored epoch times to readable format
- Checking log file timestamps across different timezones
- Verifying JWT token expiry (exp) and issued-at (iat) values
- Translating timestamps in analytics or monitoring data
How to Use Timestamp Converter
- Paste a Unix timestamp (seconds or milliseconds) into the input field.
- The converter automatically shows the equivalent UTC and local date and time.
- Or enter a readable date to get its Unix timestamp in both seconds and milliseconds.
Related Tools
FAQ
Does it support both seconds and milliseconds?
Yes. The converter auto-detects whether the value is in seconds (10 digits) or milliseconds (13 digits) and converts accordingly.
What is a Unix timestamp?
A Unix timestamp is the number of seconds (or milliseconds) elapsed since 00:00:00 UTC on 1 January 1970 — a universal way for computers to store points in time without timezone ambiguity.
Which timezone does it use?
It shows both UTC and your device's local timezone at the same time, so you can compare without switching tabs.
Can I convert a date back to a timestamp?
Yes. Enter a readable date and time and the tool returns the equivalent Unix timestamp in seconds.
Is the conversion done in the browser?
Yes. All conversion logic runs client-side using the browser's built-in Date API. No data is sent anywhere.
Why do some APIs use milliseconds instead of seconds?
JavaScript's Date.now() returns milliseconds by default, which is why many JavaScript-based APIs (and databases like MongoDB) use 13-digit millisecond timestamps. Older Unix systems and most databases (PostgreSQL, MySQL) use 10-digit second timestamps. Both formats are widely encountered.