Input
Related tools
- Temporal PlaygroundExplore date math, time zones, and DST edge cases with the Temporal API in your browser.
- Discord TimestampsGenerate Discord's timestamp tags from a date or unix time, rendered in every reader's own local timezone automatically.
- Cron ParserRead any cron expression in plain English, catch a mistake before it ships, and preview the next ten fire times in your scheduler's time zone.
- Timezone PlannerFind the overlapping working hours across two to eight cities on any date.
- Week & Day NumbersLook up the ISO 8601 week number, day of year, quarter, and weekday for any date, including tricky year boundary cases.
- Duration CalculatorAdd and subtract clock times, unit shorthand like 90m or 1.5h, and plain durations in a single expression or one per line.
What it does
Converts between unix timestamps (seconds or milliseconds) and human-readable dates. Paste a timestamp to see it as ISO 8601, local time, and relative time, or paste a date string to get its unix timestamp. Detects seconds vs milliseconds automatically.
How to use it
Paste a timestamp like 1754521200 or a date like 2026-08-06T21:00:00Z into the input. Pick a time zone to see the conversion there. Every value has its own copy button, and the URL updates so you can share exactly what you see.
Why this one
The popular epoch converter sites bury the answer under ads and cookie banners. This one is instant, works offline, never sends your input anywhere, and has no usage limits.
FAQ
- Does it handle milliseconds?
- Yes. Values of 13+ digits are treated as milliseconds, shorter ones as seconds. Both conversions are always shown.
- Is my input sent to a server?
- No. The conversion runs entirely in your browser, and the page works offline after first load.
- What date formats can I paste?
- Unix seconds, unix milliseconds, ISO 8601, RFC 2822, and anything else your browser can parse natively.
Keyboard shortcuts: press ? anywhere on this page to see them.