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Convert Timestamp to Date

Turn a Unix timestamp into a readable date and time.

One per line — paste a whole column from a log file.

The unit is detected from the magnitude of each value, so a mixed column of seconds and milliseconds still converts correctly.

What does Timestamp to Date Converter do?

Convert a Unix timestamp into a human-readable date in the format and time zone you choose. Supports seconds and milliseconds, and shows the same instant across several zones at once.

How to Use Timestamp to Date Converter

  1. 1
    Paste the timestampOne value, or a whole column.
  2. 2
    Pick a time zoneUTC, your local zone, or any IANA zone.
  3. 3
    Copy the formatted dateIn whichever format you need.

Key Features

  • Automatic detection of seconds versus milliseconds
  • Any IANA time zone, plus UTC and your local zone
  • Several output formats including ISO 8601, RFC 2822 and long-form
  • Relative time such as "2 hours ago"
  • Batch mode for converting a column of log timestamps

Frequently Asked Questions

How do I know if my timestamp is in seconds or milliseconds?

By its length. A current second-based timestamp is 10 digits; milliseconds is 13. The converter detects this automatically, and you can override it if the value is unusual.

Why does my timestamp show 1 January 1970?

Because it is zero, or very close to it — which usually means the value was empty, null, or failed to parse before reaching the converter.

Can I convert a whole column of timestamps?

Yes. Paste one per line into batch mode and each is converted separately, which is the fastest way to make a log file readable.

Which format should I use for logs?

ISO 8601 with an explicit UTC offset. It sorts lexicographically, is unambiguous internationally, and every log processing tool understands it.