Timestamp Converter
Convert Unix timestamps to dates and back, handling seconds and milliseconds, with UTC, local, ISO 8601 and relative time. Free, in your browser.
Convert Unix timestamps
Enter a Unix timestamp or a date. Conversion is two-way and instant.
What this timestamp converter does
Common use cases
- 1Reading a timestamp from a log
- 2Debugging API date fields
- 3Converting epoch to a date
- 4Getting the current epoch
- 5Checking a token expiry
- 6Working across time zones
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About Unix timestamps
A Unix timestamp is the number of seconds (or milliseconds) since 1 January 1970 UTC — the way most systems store time internally. It is unambiguous and timezone-free, which is why logs, databases and APIs use it.
This converter goes both ways: paste a timestamp to see it as UTC, your local time and ISO 8601, or enter a date to get the epoch value. It auto-detects seconds vs milliseconds by length and runs entirely in your browser.
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Got Questions? We Have Answers.
What is a Unix timestamp?
The number of seconds (or milliseconds) since 1 January 1970 UTC — the timezone-free way most systems store time.
Does it handle milliseconds?
Yes. It auto-detects seconds vs milliseconds by the number's length.
What formats does it show?
UTC, your local time, ISO 8601, and a relative "time ago / from now". Enter a date to get the epoch value back.
Does it run in my browser?
Yes. It uses your browser's clock and calendar; no data leaves your device.