Unix Timestamp Converter — Epoch to Date
Convert Unix timestamps to human-readable dates and vice versa. Free epoch converter — supports milliseconds, UTC, and local timezone.
Unix Timestamp → Human Date
Date & Time → Unix Timestamp
Three steps to get started
Timestamp to date
Paste a Unix timestamp (seconds or milliseconds) into the top panel. The tool auto-detects the format and shows the full date in UTC, local time, ISO 8601, and relative format.
Date to timestamp
Use the bottom panel to pick a date and time, then instantly get the Unix timestamp in both seconds and milliseconds.
Use "Now" shortcut
Click "Use Now" to instantly load the current Unix timestamp and see all its representations.
Unix timestamps: the universal language of time
Unix epoch time is the backbone of how computers store and communicate timestamps. Rather than storing a date as a human-readable string (which varies by locale, timezone, and format), systems store a single integer counting seconds from a fixed reference point: midnight UTC on January 1, 1970.
This approach has several advantages: integers sort correctly, arithmetic (add 86,400 to get tomorrow, subtract to find elapsed seconds) is trivial, timezone conversion is simple, and the format is unambiguous across all programming languages and platforms.
Common developer scenarios
- API debugging — log files and API responses often return timestamps; convert to check if they are correct
- JWT expiry — JWT tokens contain an
expfield as a Unix timestamp; check if a token has expired - Database records — convert
created_atorupdated_atUnix fields to readable dates - Scheduling — calculate future cron trigger times or cache TTL expirations
- Relative time — check how long ago an event happened ("3 hours ago", "yesterday")
All conversions are performed in your browser using the JavaScript Date API. No data is sent to any server.