Conversion modes
Paste a Unix timestamp to read it as a date, or paste a date to get the timestamp. The mode toggle switches the direction between Epoch and Date. Output appears instantly and can be copied with one click.
Seconds and milliseconds
Unix time is usually stored in seconds, but JavaScript Date and many APIs use milliseconds. Use the unit selector to tell the converter which magnitude to expect. A 10-digit value is typically seconds, while a 13-digit value is milliseconds.
Timezone handling
Toggle UTC on to parse and format dates using fixed Coordinated Universal Time. Turn it off to fall back to your device’s local timezone. Using UTC ensures the exact same string across all regions, which is useful when comparing logs or debugging APIs.
Processing lists
Turn on Batch by newline to process multiple values at once. Each line converts independently, so a single invalid entry will not stop the rest of the list. Enable Trim lines to automatically remove stray spaces copied from spreadsheets or database tables.