Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds.
Timestamp โ Date
Date โ Timestamp
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp (also called epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC (the Unix epoch), excluding leap seconds. It's the standard way computers represent points in time.
What's the difference between seconds and milliseconds?
Some systems use seconds (10-digit timestamp like 1700000000) and others use milliseconds (13-digit like 1700000000000). JavaScript internally uses milliseconds. Our tool auto-detects and converts both formats.
What is ISO 8601 format?
ISO 8601 is an international standard for representing dates and times. The format is YYYY-MM-DDTHH:mm:ss.sssZ, where T separates date from time and Z indicates UTC. For example: 2024-01-15T10:30:00.000Z.
Why does the local time differ from UTC?
UTC (Coordinated Universal Time) is the primary time standard. Your local time is UTC plus or minus your timezone offset. For example, if you're in New York (UTC-5), 10:00 UTC is 05:00 local time. The tool shows both UTC and your browser's local time.
Is this tool free?
Yes, completely free with no sign-up required. All conversions happen in your browser.