Timestamp Converter
Convert Unix timestamps to human-readable dates and calendar dates back to Unix timestamps, with auto-detection of seconds or milliseconds.
What it does
- Unix timestamp to human-readable date (both directions)
- Auto-detects seconds vs. milliseconds input
- UTC-aware with ISO 8601 output
- Runs locally with no upload required
Unix Timestamp → Date
Date → Unix Timestamp
Unix time counts seconds since the UTC epoch — a 10-digit value is seconds, a 13-digit value is milliseconds; paste either here to get the human-readable date, or enter a date to get the numeric stamp your API expects.