Unix timestamp converter — epoch ↔ UTC, local, and ISO (ms-aware)
Paste a Unix epoch (seconds or milliseconds), scientific notation, or a date string. See ISO UTC, locale-formatted local and UTC times, and both second- and millisecond-scale epoch values with per-field copy — computed only in your tab.
Frequently asked questions
No. Parsing uses only your browser’s Date APIs in this tab. Nothing is sent to LocalTools servers for processing.
APIs differ on seconds vs milliseconds; use the Seconds/Milliseconds mode or check digit length in Auto mode (≤10 digit integers are treated as seconds; longer integers default to milliseconds unless you override).