Convert Unix timestamps to human-readable dates and back. Live clock, multiple formats, any timezone.
A Unix timestamp (also called Epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970 at 00:00:00 UTC (the Unix epoch). It's a simple integer that represents any moment in time, regardless of timezones or date formats.
Unix timestamps are used extensively in computer systems, databases, APIs, log files, and debugging. When you see a value like 1751246400 in a database row or an API response, it's a Unix timestamp. This tool lets you instantly decode it or convert a human date into a timestamp — all client-side, nothing leaves your browser.
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A Unix timestamp is the number of seconds elapsed since January 1, 1970 (UTC). It is a common way to represent dates and times in programming.
Yes. The converter detects timestamps in seconds or milliseconds (13 digits) and converts them to human-readable dates and times.
Timestamps are converted to your browser local timezone by default. Unix timestamps themselves are always in UTC.
A Unix timestamp counts seconds (or milliseconds) since 1970-01-01 UTC. Logs, APIs, and databases often store time this way because it is timezone-agnostic. This converter translates between human-readable dates and Unix time so you can debug schedules, expiry claims, and cron windows without mental arithmetic errors.
exp values in JWTs or signed URLsAlways note whether the source is UTC or local. A correct epoch can display as “yesterday” if you render it in the wrong zone. Millisecond timestamps are ~13 digits; second timestamps are ~10 — mixing them shifts dates by decades. Leap seconds rarely matter for app logic but clock skew between hosts does.
A partner API rejected webhooks as “expired.” Converting their signature timestamp showed they sent milliseconds while the verifier expected seconds. Normalizing units aligned the five-minute skew window and restored delivery.
Conversion is mathematical; we do not sync NTP or validate remote clocks. For JWT expiry inspection specifically, see JWT Decoder.