Epoch / Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds, multiple timezones, and ISO 8601. Runs in your browser.
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp is the number of seconds (or milliseconds) that have elapsed since 1 January 1970 00:00:00 UTC. It is the universal way to represent a moment in time across systems.
How do I know if my timestamp is in seconds or milliseconds?
Timestamps in seconds are 10 digits (e.g. 1712534400). Timestamps in milliseconds are 13 digits (e.g. 1712534400000). This tool auto-detects which format you have based on the number of digits.
Can I convert a date back to a timestamp?
Yes. Switch to "Date → Timestamp" mode, enter a date and time, and the Unix timestamp is calculated instantly.
Is my data private?
Yes — completely. Everything runs locally in your browser. Nothing is sent to any server, and nothing is retained after you close the tab.
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