Epoch / Unix Timestamp Converter
A bidirectional converter for Unix epoch timestamps. Paste a numeric timestamp to instantly see the corresponding date in UTC, your local time zone, and ISO 8601 format, plus a relative 'time ago' label. The tool auto-detects whether the value is in seconds or milliseconds (timestamps above 10 trillion are treated as milliseconds).
Going the other direction, pick any date and time from a date picker to see its Unix timestamp in both seconds and milliseconds, ready to copy. A live ticker at the top of the page shows the current Unix timestamp updating every second, which is handy when you need 'right now' in epoch form.
Everything runs client-side in your browser. No data is sent anywhere. The tool is useful for developers debugging API responses, log files, database records, JWT tokens, or any system that stores time as an epoch integer.
By The Paper Room Editorial Team — Date & Time Tools
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. It is the standard way computers store points in time as a single integer. Many APIs, databases, and log systems use this format.
How does it detect seconds vs. milliseconds?▼
If the number you enter is greater than 10^12 (one trillion), the tool assumes it is in milliseconds. Otherwise it assumes seconds. This heuristic works correctly for any date between 1970 and the year 33658.
Which time zone is used?▼
The tool shows both UTC and your browser's local time zone. The local time zone is determined by your operating system settings. The date picker also uses your local time zone.
What does the 'time ago' text show?▼
It shows the relative distance between the entered timestamp and right now, in the largest appropriate unit — for example '3 hours ago', '12 days ago', or 'in 5 minutes' for future timestamps.