Paste any timestamp and get every other format at once — no picking what you have, no picking what you want. Unix seconds, milliseconds and microseconds are told apart automatically, and so are ISO 8601, RFC 2822, HTTP dates and SQL datetimes. Timezones are treated as the thing that actually causes the bugs: pick any IANA zone to read the result in, and the tool shows the UTC offset that was in effect at that exact instant rather than the zone's offset today, so a summer date reads correctly in December. When your input carries no timezone at all, the tool says so and lets you choose what to assume, instead of quietly picking one and being an hour out. Everything runs in your browser.
This tool does not use any data storage or network traffic.
Current Unix time
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Or pick a date and time
Offset at that instant
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Every format
Enter a timestamp or a date above and every format appears here.
Nothing leaves your browser
Every conversion is calculated locally using your browser's own timezone database. Nothing is uploaded, nothing is stored, and reloading the page clears it all.