Unix Timestamp Converter
Epoch ↔ date with time-zone picker, ms/s toggle and language snippets.
About Unix Timestamp Converter
What this does
Convert between Unix epoch seconds (or milliseconds) and human-readable dates in any IANA time zone. The current epoch ticks live at the top, and each side of the converter is bidirectional — type on one side, the other side updates.
What developers use it for
- Debugging timestamps in JSON API responses / logs
- Verifying a webhook's
created_at - Building a
expires_atvalue in seconds without doing math in your head - Copy-pasting the right one-liner for whichever language is open (JS, bash / macOS
date -r, Python, PHP)
Seconds vs milliseconds
Unix time is seconds since 1970-01-01 UTC, but JavaScript's Date and many modern APIs (JS, Firebase, Java) use milliseconds. Toggle the unit at the top — the parsed date, ISO output, and generated snippets all adapt.
Frequently asked questions
A curated set of major zones (UTC + 13 more). Add your local zone by editing the tz select — the underlying `Intl.DateTimeFormat` supports every IANA zone.
Your value is probably in milliseconds — flip the ms/s toggle at the top.
Native browser datetime-local — YYYY-MM-DD HH:MM in your local zone.
No — they copy a one-liner to your clipboard so you can paste it into a REPL, shell or editor.
Embed this tool on your site
Drop a one-line iframe snippet into any blog, lesson plan, or knowledge base. Powered-by-Toolenza link included.
Embed this tool
Paste this snippet into any HTML page. The tool runs entirely in your reader's browser.
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Unix Timestamp Converter
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