Unix Timestamp Converter — Unix time counts seconds since 00:00:00 UTC on 1 January 1970. It is compact and timezone-free, which is why logs, databases, and APIs use it — but humans cannot read 1700000000 at a glance. This converter translates both directions instantly.
All conversion happens locally in your browser.
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What is unix timestamp converter?
Unix time counts seconds since 00:00:00 UTC on 1 January 1970. It is compact and timezone-free, which is why logs, databases, and APIs use it — but humans cannot read 1700000000 at a glance. This converter translates both directions instantly.
It auto-detects whether a value is in seconds or milliseconds, shows the date in ISO 8601, UTC, and your local timezone, and includes a live readout of the current Unix time.
How to use it
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Paste a timestamp
Seconds (10 digits) or milliseconds (13 digits) — the unit is detected automatically.
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Read the date
ISO, UTC, local, and relative representations appear instantly.
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Or pick a date
Use the date picker to get the matching Unix seconds and milliseconds.
Examples
Seconds to date
A 10-digit value is treated as seconds.
1700000000
Result: 2023-11-14T22:13:20.000Z
Frequently asked questions
Related guides
What Is a Unix Timestamp and Why Do Programmers Use It?
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What Is a Unix Timestamp? (And Where You'll See One)
A Unix timestamp is the number of seconds since January 1, 1970, UTC. It is the universal time format for computers: small, sortable, timezone-independent, and trivially comparable. Here is what it is, where you will see one, the Year 2038 problem, and how to convert to and from a human-readable date in your browser.
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Last reviewed: 2026-09-18