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Tools/Timestamp Converter

Timestamp Converter & World Clock

Convert Unix timestamps to human-readable dates and back. Live world clock with 30+ time zones, ISO 8601, RFC 2822, and relative time display. Plus timezone tools, date math, countdown timers, and more.

All processing happens in your browser — nothing is sent to our servers
Seconds
1775189630
Milliseconds
1775189630028
How it works
Unix Timestamp & Time Zone Conversion
01Unix epoch

Seconds since January 1, 1970 00:00:00 UTC — the universal time reference used by all major operating systems and languages

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02Auto-detect

10-digit values treated as seconds, 13-digit as milliseconds — JavaScript Date uses milliseconds internally

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03Time zone

Intl.DateTimeFormat converts UTC to any IANA time zone — handles DST transitions, UTC offsets, and locale formatting

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04Formats

ISO 8601 (2024-03-26T12:00:00Z), RFC 2822 (Tue, 26 Mar 2024 12:00:00 +0000), relative ('3 hours ago'), and locale-specific

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05World clock

Live display across multiple time zones — same instant shown in UTC, Americas, Europe, Asia, and Oceania simultaneously

Spec: ECMA-262 §21.4 (Date), IANA Time Zone Database, ISO 8601, RFC 2822

Always store timestamps in UTC and convert to local time only for display. This avoids ambiguity from daylight saving time changes and makes your data portable across regions.

Frequently Asked Questions