How to use Open Epoch

Open Epoch works the moment it loads. Here is how to get the most out of it.

Convert a timestamp to a date

1. Paste a Unix timestamp into the main input.
2. Open Epoch detects seconds or milliseconds and shows the readable date.
3. Read the result in your current timezone, with the relative time ("3 hours ago") alongside.

Convert a date to a timestamp

1. Type or pick a date and time.
2. Open Epoch shows the matching Unix timestamp in seconds and milliseconds.
3. Copy the value with one click.

Read other timezones

1. Change the timezone selector to see the same moment elsewhere.
2. Use the world clock to compare several zones at a glance.

Copy developer formats

1. Open the formats panel for ISO 8601, RFC, and relative-time strings.
2. Click any format to copy it.

Your timezone, theme, and language are remembered in your browser for next time.

No account needed. Everything runs locally.