Timestamp Converter
Convert between Unix timestamps, ISO dates, and local time.
178012399817801239982052026-05-30T06:53:18.205ZSat, 30 May 2026 06:53:18 GMTSat May 30 2026 06:53:18 GMT+0000 (Coordinated Universal Time)🔒 Runs entirely in your browser.
About this tool
Convert between Unix epoch seconds, milliseconds, and ISO 8601 dates. Detects format automatically.
Frequently asked
▸What's the difference between Unix and ISO 8601?
Unix timestamps are seconds (or milliseconds) since 1970-01-01 UTC — a single integer. ISO 8601 is a human-readable string like 2026-05-28T09:30:00Z. The converter accepts either as input and shows both as output.
▸How does it handle time zones?
Unix timestamps are always UTC by definition. The converter shows the corresponding ISO time in UTC (with Z) and in your browser's local time zone. If you need a specific other zone, paste the ISO into the World Clock tool.
▸Seconds or milliseconds?
The converter detects which based on magnitude (anything above ~10^12 is treated as milliseconds, which covers all dates beyond September 2001 in seconds). You can also pick explicitly via the dropdown.
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