Free Unix Epoch Timestamp Converter
Convert between Unix timestamps (seconds/milliseconds) and human-readable dates. Shows local time, UTC, ISO 8601, and relative time formats. Auto-detects timestamp format.
Timestamp → Date
Date → Timestamp
What Is Unix Epoch Time?
Unix epoch time (also called POSIX time) is the standard way to represent time in computing. It counts the number of seconds (or milliseconds) elapsed since January 1, 1970 at 00:00:00 UTC. This single number makes it easy to store, compare, and calculate time differences across different systems and timezones.
Common Uses for Timestamp Conversion
- API Debugging · Convert timestamps in API responses to understand when data was created or modified.
- Log File Analysis · Read and understand timestamp logs from servers and applications.
- Date Calculations · Calculate time differences by subtracting two Unix timestamps.
- Cross-Platform Development · Store dates in a timezone-independent format for databases and configuration files.
- JavaScript Development · Convert between Date objects and timestamps for time tracking and scheduling.
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp (also called Epoch time or POSIX time) is the number of seconds (or milliseconds) since January 1, 1970 at 00:00:00 UTC. It's a standard way to represent time in computing.
What's the difference between seconds and milliseconds?
Unix timestamps can be in seconds (10 digits, e.g., 1711824000) or milliseconds (13 digits, e.g., 1711824000000). This tool auto-detects based on the length of the input.
Why is my converted time off by hours?
The timestamp converter shows local time, UTC, and ISO 8601 formats. If your result doesn't match expected time, check that you're reading the timezone-aware result (UTC vs local time difference).