Unix ↔ ISO ↔ timezone, with a live clock and IANA timezone picker.
Timestamps are deceptively tricky: seconds vs milliseconds, UTC vs local, ISO 8601 with and without timezone offset, IANA names like America/New_York. This converter handles all of them. Paste any common format — 1700000000, 2023-11-14T22:13:20Z, 'last Tuesday at 3pm', a JavaScript Date toString — and see it normalized to Unix seconds, Unix milliseconds, ISO 8601, and a multi-timezone list you control. The live clock at the top lets you grab 'now' in any format, and the IANA timezone picker has fuzzy search so you don't have to remember the exact spelling of Asia/Kolkata. All logic runs in your browser using Intl APIs.