Everything About Timestamp Conversion
Unix timestamps (Epoch Time) represent elapsed time since January 1, 1970 00:00:00 UTC in seconds (or milliseconds). They are the standard for handling time in databases, API responses, and log files. But numbers like "1715400000" are unreadable to humans — this tool instantly converts them to human-readable dates.
Supports both timestamp-to-date and date-to-timestamp conversion. Automatically detects seconds (10 digits) vs milliseconds (13 digits) for appropriate conversion. JavaScript's Date.now() returns milliseconds while Python's time.time() returns seconds — confusing these produces dates in 1970 or 2500.
Also displays ISO 8601 format (2024-01-15T09:30:00.000Z) and relative time ("3 days ago", "2 hours from now"). When API docs specify "timestamp in ISO 8601," convert to this format. Shows both UTC and local timezone (KST, etc.) simultaneously to prevent timezone confusion.
Pro tip: The most common time-related bugs in debugging are seconds/milliseconds confusion and timezone issues. If API response timestamps seem wrong, verify immediately with this tool. Also useful for quickly getting "current timestamp" when creating timestamp parameters for API testing.