Convert Unix timestamps, milliseconds, and ISO dates in both directions. Enter a timestamp or pick a date to see local time, UTC, and epoch values instantly.
—Local time
—UTC
—Unix (seconds)
—Unix (ms)
Accepts Unix seconds, Unix milliseconds, or ISO 8601 date strings.
Frequently Asked Questions
What input formats work?
Unix seconds (1717520400), Unix milliseconds (1717520400000), or ISO 8601 strings like 2024-06-04T12:00:00Z.
Which timezone is shown?
Local time uses your browser timezone. UTC is shown separately for server-side reference.
Can I convert JWT exp claims?
Yes. Paste the numeric exp value from a JWT payload to see the expiration date.
Is data sent to a server?
No. All conversion runs locally in your browser.
Is this tool free and does it work on mobile?
Yes on both counts. The Timestamp Converter on draft21 is completely free with no sign-up required and works on all devices.