Convert between Unix timestamps and human-readable dates
Current Timestamp
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Calculate the difference between two dates in years, months, days
Convert time between different timezones
Calculate your exact age in years, months, days and more
Set a countdown to any future date and time
Unix Timestamp Converter is a free online tool that lets you convert between Unix timestamps (also known as epoch time or POSIX time) and human-readable date and time formats. A Unix timestamp represents the number of seconds that have elapsed since January 1, 1970, at 00:00:00 UTC — a reference point known as the Unix epoch. This system is the universal standard for recording time in computing because it is unambiguous, timezone-independent, and easy to perform arithmetic on. Unix timestamps are used everywhere in software development: server logs, database records, API responses, authentication tokens, file metadata, and system events all commonly store time as epoch seconds or milliseconds. Being able to quickly convert these values into readable dates — and vice versa — is an essential skill for developers and system administrators who need to debug issues, analyze logs, or build time-dependent features. This tool supports both seconds and milliseconds precision, shows the current live timestamp, and displays conversions in your local timezone with relative time descriptions (e.g., '2 hours ago'). You can convert timestamps to dates or dates back to timestamps with a single click. All processing runs entirely in your browser — no data is sent to any server.
Unix timestamp = Number of seconds since January 1, 1970, 00:00:00 UTC Examples: - 0 → January 1, 1970 00:00:00 UTC - 1000000000 → September 9, 2001 01:46:40 UTC - 1700000000 → November 14, 2023 22:13:20 UTC Milliseconds: multiply seconds by 1000 - 1700000000 seconds = 1700000000000 milliseconds To get current timestamp in JavaScript: Math.floor(Date.now() / 1000) // seconds Date.now() // milliseconds