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Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates. Show ISO 8601, UTC, local time, and relative time.

Current Unix Timestamp

1777063758

Timestamp to Date

Date to Timestamp

How to Use Unix Timestamp Converter

  1. 1Enter a Unix timestamp (seconds or milliseconds) to convert to a human date.
  2. 2Or pick a date and time to convert to a Unix timestamp.
  3. 3View the result in ISO 8601, UTC, local time, and relative formats.
  4. 4Copy any format with one click.
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Frequently Asked Questions

What is a Unix timestamp?▾
A Unix timestamp (epoch time) is the number of seconds since January 1, 1970, 00:00:00 UTC. It is used widely in programming to represent dates in a simple integer format.
What is the difference between seconds and milliseconds?▾
Unix timestamps in seconds have 10 digits (e.g., 1700000000), while milliseconds have 13 digits (e.g., 1700000000000). JavaScript uses milliseconds, while most Unix systems use seconds.
What is the Y2K38 problem?▾
On January 19, 2038, 32-bit Unix timestamps will overflow. Systems using 32-bit integers to store timestamps will wrap around to negative values. Most modern systems now use 64-bit integers.
What timezone does this tool use?▾
The tool shows both UTC and your local timezone. Unix timestamps are always in UTC. The local time display uses your browser timezone setting.
Can I use this tool on my phone?▾
Yes, the epoch converter works in any modern mobile browser. The live timestamp display and date picker are fully responsive on mobile devices.
Does the tool auto-detect seconds vs milliseconds?▾
Yes. If you enter a number with more than 12 digits, the tool automatically treats it as milliseconds and converts accordingly. Numbers with 10 digits are treated as seconds.
Can I copy the converted values?▾
Yes. Each output row (UTC, ISO 8601, Local Time, Relative, Seconds, Milliseconds) has a copy button to copy that specific value to your clipboard.