Unix Timestamp Converter
Your data never leaves your browserConvert Unix timestamps to human-readable dates, or date strings to Unix timestamps.
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About Unix Timestamp Converter
Convert a Unix epoch timestamp (seconds or milliseconds since 1970-01-01 UTC) to a human-readable date in ISO 8601, UTC, and local time formats. Or go the other direction: paste a date string and get the Unix timestamp back. Useful for debugging logs, APIs, and database records.
How to use
- Choose the conversion direction: Timestamp to Date or Date to Timestamp.
- Enter the Unix timestamp (e.g. 1700000000) or a date string (e.g. 2025-11-14T22:13:20Z).
- The converted value appears instantly in the output panel.
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Frequently Asked Questions
FAQs about Unix Timestamp Converter
What is a Unix timestamp?
A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC. It is widely used in programming, databases, and log files.
Seconds vs milliseconds — which should I use?
Most Unix timestamps are in seconds. JavaScript's Date.now() and many APIs use milliseconds. A 13-digit number is almost certainly milliseconds; a 10-digit number is seconds.
What formats does the date output include?
The tool outputs ISO 8601 (e.g. 2023-11-14T22:13:20.000Z), UTC string, and your local time with timezone offset.
Can I convert a date string back to a timestamp?
Yes. Switch the direction to "Date → Timestamp" and enter any date string that JavaScript's Date.parse() understands, such as ISO 8601 or RFC 2822 formats.
Is my data safe?
All conversion runs in your browser. No data is sent to any server.