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Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and back. Auto-detects seconds and milliseconds.

Auto-detects seconds & msUTC & local timeNo data stored
Unix Timestamp
Enter a timestamp in seconds or milliseconds
Human-Readable Date
Pick a date and time to convert to a timestamp

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What is a Unix timestamp? A Unix timestamp is the number of seconds elapsed since January 1, 1970 00:00:00 UTC (the Unix epoch).

Timestamps with 13 digits are in milliseconds. All conversions happen locally in your browser — no data is sent anywhere.