Unix Timestamp Converter

Convert Unix Timestamps to Dates — and Back — in Your Browser

A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970. It is how nearly every database, log file, API, and programming language stores an instant in time — compact, unambiguous, and timezone-free. The problem is that 1757116800 means nothing to a human. CipherForces Unix Timestamp Converter turns any epoch value into a readable date in your local time, UTC, ISO 8601, and RFC 2822, and converts any calendar date back into an epoch — all instantly, with copy buttons on every field.

The converter auto-detects whether your value is in seconds, milliseconds, microseconds, or nanoseconds by its digit count, so you can paste a raw log line without thinking about units — and override the detection with one tap when you hit the ambiguous pre-1973 range. A live-ticking current epoch sits at the top in both seconds and milliseconds, ready to copy, which is exactly what you need when seeding a test fixture or filling a query.

Everything runs entirely in your browser using the native JavaScript Date and Intl APIs — including the full IANA time-zone database via Intl.supportedValuesOf, so daylight-saving transitions are handled correctly for every zone. No timestamp is ever uploaded, logged, or sent to a server, which matters when the epoch you are debugging came out of a production system.

Common Use Cases

• Debugging logs and APIs: Paste an epoch from a server log, JWT exp claim, or webhook payload and read the exact date it points to in your own timezone.
• Writing database queries: Grab the current epoch or convert a human date into seconds or milliseconds for a WHERE created_at > … clause.
• Cross-timezone coordination: Convert a meeting time entered in one IANA zone into the precise UTC instant, then read it back in any other zone.
• Test fixtures & seed data: Copy the live millisecond epoch to pin a deterministic timestamp in a unit test or migration.
• Understanding relative age: See at a glance whether a token expired “3 hours ago” or renews “in 2 days” with a human relative-time readout.

Key Features

• Auto unit detection: Seconds, milliseconds, microseconds, and nanoseconds recognised automatically, with a manual override switch.
• Every format at once: Local, UTC, ISO 8601, RFC 2822 / HTTP, relative-to-now, plus raw seconds and milliseconds — each individually copyable.
• Full timezone support: The complete IANA zone list with live UTC-offset readout, applied consistently to both directions of conversion.
• Live current epoch: A ticking clock in seconds and milliseconds with one-click copy and a “use as input” shortcut.
• Date picker → epoch: Pick any calendar date and time, interpreted in your chosen zone, and get the exact epoch back — DST boundaries included.

Privacy: All conversion happens locally in your browser with native browser APIs. Your timestamps never leave your device, and there are no usage limits.