Unix Timestamp Converter
Convert Unix timestamps to human dates and back, in seconds or milliseconds.
About this tool
A Unix timestamp counts the seconds (or milliseconds) since 1 January 1970 UTC. It's the standard way computers store time, but it's unreadable at a glance.
Paste a timestamp to see it as a UTC string, your local time, ISO 8601 and a relative phrase like "3 days ago" — the tool auto-detects seconds vs milliseconds. Or enter a date to get the timestamp back. The "Now" button fills the current epoch.
Frequently asked questions
By length: values up to 11 digits are treated as seconds, longer ones as milliseconds. That matches the typical ranges for current dates in each unit.
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