Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates, with a live updating current-time clock. Includes three panels: a live current Unix timestamp (updates every 1 s), a timestamp-to-date converter that auto-detects seconds vs milliseconds, and a date/time picker that produces a Unix timestamp in seconds. Each value has its own copy button.

1. The Current Timestamp card shows the live Unix time in seconds and refreshes every second; copy it with the Copy button. 2. In Timestamp to Date, paste a Unix timestamp (seconds or milliseconds); use the Now button to fill the current value. 3. The result grid shows ISO 8601, UTC string, local date/time, date only, time only (UTC), Unix seconds, and Unix milliseconds - each copyable. 4. In Date to Timestamp, pick a date and time; the corresponding Unix seconds value appears with a copy button.

The converter treats any input value greater than 1e12 (1,000,000,000,000) as milliseconds and anything smaller as seconds, then multiplies by 1000. So a 10-digit value is read as seconds and a 13-digit value as milliseconds. Non-numeric input or values that resolve to an invalid Date produce an "invalid timestamp" message and no output grid.