Convert ISO 8601, RFC 3339 and RFC 2822 strings to Unix seconds, milliseconds, microseconds and nanoseconds. Instant, in-browser, free tool. All processing runs locally in your browser. Your data is not uploaded to any server.
100% Local Processing
How to Use
Paste any standard date string and get the Unix epoch equivalent back. The reverse of the timestamp to date converter, for when a number is what the API wants.
Steps
Paste an ISO 8601, RFC 3339 or RFC 2822 string.
Click Parse.
Read the Unix values and compare them against your own offset row to verify the parse.
Accepted strings
ISO 8601 with a Z suffix or a numeric offset such as +08:00.
RFC 3339 strings, which are a subset of ISO 8601.
RFC 2822 dates such as Sun, 20 Sep 2026 12:00:00 GMT.
HTTP Date headers copied straight from a response.
Features
Unix seconds, milliseconds, microseconds and nanoseconds at once.
The parsed value is normalised back to ISO 8601 in UTC.
Your local UTC offset is shown for a quick sanity check.
All processing runs locally in your browser. Your data is not uploaded to any server.