- Epoch (s)
1790511223 - Epoch (ms)
1790511223000 - ISO 8601
2026-09-27T12:13:43.000Z - UTC
Sun, 27 Sep 2026 12:13:43 GMT - Lokální
9/27/2026, 2:13:43 PM - Relativní
1 sec ago
Format this timestamp for a human-readable changelog entry - give a relative phrase and the absolute ISO 8601 form. One line, no extra prose: 1 sec ago (2026-09-27T12:13:43.000Z)
(Dokumentace v angličtině)
What it does
Converts a Unix epoch timestamp into every date representation you normally need, all at once: epoch seconds, epoch milliseconds, ISO 8601 (UTC), an RFC-style UTC string, your local time, and a plain-English relative phrase (“3 min ago”, “in 2 day”). It converts in both directions - type an epoch number or pick a date and time from the local picker.
Enter any second-precision value (negatives included) and the six output rows update instantly; each row has its own copy button. The relative bucket rounds to seconds, minutes, hours, days, months, or years. 100% client-side, evaluated in your browser’s time zone.
How to use it
- The tool opens on the current time. Type any epoch value in seconds into Epoch (seconds) - or click Now to snap back to the present.
- Alternatively set the date and time with the Date (local) picker; the epoch value follows.
- Read the six rows: Epoch (s), Epoch (ms), ISO 8601, UTC, Local, Relative.
- Click Copy on any row to grab exactly that representation.
- Share a specific timestamp by adding
?t=<epoch-seconds>to the URL (e.g./tools/timestamp?t=1750000000) - the tool loads with that value. - Below the rows, the prompt bar copies a pre-filled AI prompt built from your live values - Humanize for a changelog or Convert to RFC 3339.
Examples
Verified by running the tool’s exact row computation on fixed inputs. The first four rows are timezone-independent:
Input 1750000000:
Epoch (s) 1750000000
Epoch (ms) 1750000000000
ISO 8601 2025-06-15T15:06:40.000Z
UTC Sun, 15 Jun 2025 15:06:40 GMT
Input 0 (the epoch itself):
ISO 8601 1970-01-01T00:00:00.000Z
UTC Thu, 01 Jan 1970 00:00:00 GMT
Input 1000000000:
ISO 8601 2001-09-09T01:46:40.000Z
UTC Sun, 09 Sep 2001 01:46:40 GMTThe Local and Relative rows depend on the viewing machine. On a UTC+2 machine, 1750000000 renders as 6/15/2025, 5:06:40 PM local; its relative phrase at the time of writing is 1 yr ago. A future value such as 2000000000 renders as in 7 yr - the relative row recomputes on every render.
Good to know
- Private: everything is computed locally in your browser; nothing is sent to a server.
- The tool works in seconds. If you paste a millisecond value, divide by 1000 first (the
Epoch (ms)row gives you the exact product back). - Negative epochs are valid and land before 1970 (
-86400→1969-12-31T00:00:00.000Z). Absurdly large values (beyond the JS date range, e.g.1e15) make the date rows show-. - The local picker sends the chosen wall-clock time through your current time-zone offset, so a shared
?t=link shows the same instant but a different local string per viewer. - Relative phrases use fixed-length buckets (30-day months, 365-day years) - they are human labels, not calendar arithmetic.
- Related tools: Cron Expression Explainer, ULID Generator, UUID Generator