Developer Tool

Timestamp Converter

Convert Unix timestamps to human-readable dates and back. Supports seconds, milliseconds, ISO 8601, RFC 2822, and multiple timezone outputs.

Complete Timestamp Conversion

Every date format, every timezone

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Live Clock

Displays your current local time and Unix timestamp live, updated every second.

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15+ Timezones

Output results in any major timezone from New York to Tokyo, with correct DST handling.

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Multiple Formats

ISO 8601, RFC 2822, Unix seconds, Unix milliseconds, human-readable, and relative time.

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Bi-Directional

Convert from timestamps to dates, or from any date string back to a Unix timestamp.

Frequently Asked Questions

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). It's a timezone-independent way to store dates used across most programming languages and databases.

What's the difference between seconds and milliseconds?

JavaScript and many APIs use milliseconds (13 digits for modern dates), while Unix systems, Python, and databases often use seconds (10 digits). You can detect which by the number of digits in your timestamp.

What is ISO 8601?

ISO 8601 is an international standard for date-time representation, e.g. 2024-01-15T14:30:00Z. The Z suffix means UTC. It's the most portable format for APIs and data exchange.

Why does my timestamp show a different date?

Timestamps are always UTC-based. The displayed date depends on the selected timezone. A timestamp of midnight UTC appears as 8pm the previous day in New York (UTC-5 in winter).