Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates with this free online epoch time converter. Whether you need to decode a Unix timestamp to a date or convert a specific date and time into an epoch timestamp, this tool handles both directions instantly. Supports both seconds and milliseconds formats with automatic detection.

What is a Unix Timestamp (Epoch Time)?

A Unix timestamp (also called epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970, at 00:00:00 UTC — a moment known as the "Unix epoch." This simple integer representation of time is used universally in programming because it eliminates ambiguity around timezones, daylight saving changes, and date format variations.

• Seconds vs Milliseconds: Traditional Unix timestamps count seconds since the epoch (e.g., 1700000000). JavaScript and many modern APIs use milliseconds instead (e.g., 1700000000000). Our converter automatically detects which format you're using based on the number of digits.
• The 2038 Problem: Systems that store Unix timestamps in a 32-bit signed integer will overflow on January 19, 2038. After that date, the value wraps around to a negative number. Most modern systems now use 64-bit integers, which push the overflow date billions of years into the future.

How to Use the Epoch Converter

The tool features a live Unix timestamp counter that updates in real-time, showing you the current epoch time at a glance. Use the date-to-timestamp converter with individual year, month, day, hour, minute, and second fields for precision. Toggle between local time and UTC for accurate timezone-aware conversions.

This timestamp converter is completely free, requires no signup, and runs entirely in your browser. Ideal for developers working with APIs, log files, databases, or any system that stores dates as epoch timestamps. Bookmark it for quick access whenever you need to decode or encode Unix time.