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Number Base Converter
Convert between binary, octal, decimal and hex, including very large numbers.
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Timestamp Converter
Convert between Unix timestamps and readable dates.
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Processed locallyAbout Timestamp Converter
Converts second and millisecond timestamps to dates and back, showing UTC and your local time together.
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Accepts second and millisecond timestamps, telling them apart by length.
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Shows local time and UTC side by side, which is where time-zone mistakes usually hide.
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Timestamp to date and date to timestamp update live in both directions.
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Paste a timestamp or a date
Ten digits are read as seconds, thirteen as milliseconds; a date-time string works too.
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Compare both zones
Use the UTC column as the reference when writing logs or API docs.
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Copy a value
Click any row to copy that value.
Ten digits mean seconds (classic Unix time), thirteen mean milliseconds (JavaScript Date.now()). This tool decides by length.
Local time uses your browser time zone, with UTC alongside for reference.
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