Unix Timestamp Converter
Convert Unix epoch timestamps in seconds and milliseconds to human-readable UTC and local dates, or calculate timestamps from dates.
How to Use Unix Timestamp Converter
- Live Timestamp Clock: Check the live ticking epoch card at the top, or click 'Copy Current Timestamp' to grab it immediately.
- Timestamp to Date: Paste a numeric timestamp (seconds or milliseconds) into the left panel to convert to UTC, local time, ISO 8601, and relative time.
- Date to Timestamp: Pick any date and time on the right panel and select Local or UTC timezone to calculate the exact epoch seconds and milliseconds.
Frequently Asked Questions
What is a Unix timestamp (Epoch time)?
A Unix timestamp is the total number of seconds elapsed since January 1, 1970 at 00:00:00 UTC (the Unix Epoch), not counting leap seconds.
How does this tool distinguish between seconds and milliseconds?
10-digit timestamps (e.g. 1774982400) represent seconds, while 13-digit timestamps (e.g. 1774982400000) represent milliseconds. The converter auto-detects or lets you toggle explicitly.
What is the Year 2038 Problem (Y2K38)?
On January 19, 2038, 32-bit signed integers will overflow past 2,147,483,647 seconds. Modern 64-bit systems and this tool use 64-bit precision, handling dates billions of years into the future.
Are conversions calculated locally?
Yes, all date conversions and time calculations are executed in your browser's local JavaScript date engine.