Free Online Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Live ticking current timestamp. Supports timezones, milliseconds, and ISO 8601. Free and 100% client-side.
100% Client-Side · Your data never leaves your browserHow to Use Unix Timestamp Converter
The live ticker at the top shows the current Unix timestamp in seconds, updating every second. Click Copy to grab it.
Timestamp → Date: Enter any Unix timestamp (seconds or milliseconds — auto-detected) and select a timezone. Click Convert to see the equivalent date in ISO 8601, local time, UTC, and relative format.
Date → Timestamp: Enter a date/time string in any common format (e.g. 2024-06-15 14:30:00 or 2024-06-15T14:30:00Z) along with the timezone it represents, and get the Unix timestamp and milliseconds back.
Keyboard shortcut: Ctrl/Cmd+Enter to convert, Ctrl/Cmd+K to clear.
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC — a point known as the Unix epoch. It's the most common way to represent time in programming, databases, and APIs.
What is the difference between a Unix timestamp in seconds vs milliseconds?
The original Unix timestamp is in seconds. JavaScript and many modern APIs use milliseconds (multiply seconds by 1000). A 10-digit number is typically seconds; a 13-digit number is typically milliseconds. This tool auto-detects both.
What is the Unix timestamp for "now"?
It's shown at the top of this page, ticking live every second. You can copy it with one click.
How do I convert a date string to a Unix timestamp?
Switch to "Date → Timestamp" mode, enter any date/time string (ISO 8601, or formats like "2024-06-15 14:30:00"), select your timezone, and click Convert.
Why do timestamps look different in different timezones?
A Unix timestamp always refers to a specific moment in UTC. The "local" display changes based on the timezone offset applied. The underlying timestamp value is the same regardless of timezone.