Timestamp Converter

Timestamp Converter translates between Unix epoch seconds (or milliseconds) and human-readable calendar dates. Paste "1699999200" and see "2023-11-15 00:00:00 UTC"; type a date and get the exact integer a database or API expects. Unix timestamps are everywhere in backend systems because they sidestep timezone ambiguity entirely — a single integer that any database column (BIGINT), log format, or JSON field can store and sort. You'll encounter them in MongoDB's _id, in file modification times returned by stat(), in JWT "exp" and "iat" claims, in cron job schedules, in AWS CloudWatch log event timestamps, and in every system that needs to compare dates across timezones without parsing overhead. The tool shows both UTC and your local timezone side by side, which resolves the classic "is this timestamp in UTC or my local time?" confusion that causes production bugs. It handles millisecond timestamps (13 digits, used by Java, JavaScript Date.now(), and Java) and second timestamps (10 digits, used by C, Go time.Unix(), and most SQL databases) — automatically detecting which you meant. Supports relative input too: type "+7 days" or "now" to compute future or past timestamps, useful for setting cookie expiry, cache TTLs, or token expiration windows.