Unix Timestamp Converter

## Time math, without the copy-paste gymnastics Type any timestamp — 10-digit unix seconds, 13-digit milliseconds, an ISO 8601 string, or even "next Monday" — and get all four canonical representations at once. All timezones. Live relative times. Batch mode for CSV-style lists. No registration, no tracking. ### What you'll reach for it for - **Smart autodetect.** 10 digits → seconds. 13 digits → milliseconds. `T` + `Z` → ISO. Anything else goes through `new Date(…)`. - **Four outputs, always.** Unix seconds, unix ms, ISO 8601 UTC, and human-readable in any IANA timezone — all produced with one click and each has its own copy button. - **Timezone picker.** All Intl-supported zones are in the dropdown; a strip of quick chips covers the most common cases (UTC, Local, Los Angeles, New York, London, Kolkata, Tokyo). - **Relative time.** "3 hours ago", "in 42 minutes" — updates as the local clock ticks. - **Quick-action chips.** Now, +1 hour, -1 day, Start of today, End of year, Unix epoch — skip the maths and jump straight to the moment you need. - **Live clock banner** shows the current unix + ISO at all times. - **Batch mode.** Paste a column of timestamps, get a table, copy it as CSV or download it. Great for log-file debugging. - **URL-shareable state.** The timestamp and timezone live in the URL (capped so we never balloon link length), so you can bookmark an exact moment or send it to someone. Whether you're debugging a Kubernetes log line, writing a schedule job, or figuring out which day `1776506400` falls on — this tool is meant to be the last stop.