Developer Utility

Timestamp Converter

Explain Unix timestamps or convert date and time values into seconds or milliseconds locally.

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Explain timestamp

Resolve Unix timestamps into UTC date and time

Paste signed seconds or milliseconds, keep auto-detect for the common case, and confirm the resolved unit.

Auto-detect stays visible

Ambiguous historical values can look like either seconds or milliseconds, so the result always shows the unit that was actually used.

Signed whole numbers are accepted. Use seconds for 10-digit epoch values and milliseconds for 13-digit values.

Use auto-detect unless you need to force seconds or milliseconds.

Output

Normalized timestamp

Paste a Unix timestamp to resolve its unit and see the corresponding UTC date and time.

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Details

Resolved output

Resolved unit
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UTC date and time
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ISO 8601
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Epoch milliseconds
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Generate timestamp

Convert date and time values back into Unix timestamps

Interpret the entered wall-clock time as either UTC or Local, choose seconds or milliseconds, and copy the latest valid output.

Timezone interpretation is explicit

The same wall-clock time maps to a different timestamp in UTC and Local mode, so the selected interpretation stays visible in the generated result.

The browser-native control includes seconds precision when available.

Choose how the entered wall-clock time should be interpreted.

Match the API or log format you need to paste into.

Output

Generated timestamp

Enter a date and time to generate a copy-ready Unix timestamp.

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Details

Canonical UTC output

Interpreted as
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UTC date and time
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ISO 8601
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Epoch milliseconds
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Timestamp Converter is a browser-local utility for developer workflows. Explain Unix timestamps or convert date and time values into seconds or milliseconds locally. It supports explain timestamp and generate timestamp without sending inputs to a server.