What is a Unix timestamp?

A Unix timestamp (also called epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC, excluding leap seconds. It's the standard way to represent time in computing because it's a single integer that's unambiguous and timezone-independent.

How does the converter know if my timestamp is in seconds or milliseconds?

The tool auto-detects based on the number's magnitude. Timestamps in seconds are typically around 1-2 billion (as of 2024), while millisecond timestamps are around 1-2 trillion. If the value is above 10 billion, it's treated as milliseconds. You can override this with the format toggle.

Does the converter handle timestamps before 1970?

Yes. Negative Unix timestamps represent dates before the epoch (January 1, 1970). Enter a negative number and the converter will display the corresponding date before 1970.

What timezone is the output in?

The converter shows the result in both UTC and your local browser timezone. UTC is the universal reference, and the local timezone is calculated from your system clock settings, including any daylight saving time adjustments.

Can I convert a specific date to a Unix timestamp?

Yes. Use the date picker to select a date and time, and the tool will output the corresponding Unix timestamp in both seconds and milliseconds. This is useful for generating timestamps for API calls or database inserts.

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Unix Timestamp Converter

A Unix timestamp converter translates between epoch timestamps (seconds or milliseconds since January 1, 1970 UTC) and human-readable dates. It auto-detects seconds vs. milliseconds and displays the result in both UTC and local timezone.

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What is Unix Timestamp Converter?

A Unix timestamp converter is an online utility that translates between Unix epoch timestamps and human-readable date formats, supporting both second-precision and millisecond-precision timestamps with automatic format detection.

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These tools work great alongside Unix Timestamp Converter:

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Start Using Unix Timestamp Converter Today

Unix timestamps are everywhere in computing—from server logs to API payloads to database records—but they're meaningless to human eyes. This converter makes them instantly readable, and does the reverse just as fast. With auto-detection of seconds vs. milliseconds, dual timezone output, and one-click copy, it's the fastest way to bridge the gap between epoch time and the dates you actually understand.

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