Timestamp Converter

Runs in browser Utilities

Paste an epoch timestamp or a date string and get ISO 8601, RFC 2822, local time, UTC, relative time and the epoch in seconds/milliseconds/nanoseconds. Auto-detects the unit.

Privacy: This tool runs entirely in your browser. Your input never leaves your device.

How to use Timestamp Converter

  1. Paste a timestamp or a date string.
  2. Leave the unit on Auto-detect or choose one explicitly.
  3. Select the timezone in which you want to read the result.
  4. Copy any of the formats or the epoch values.

Timestamp Converter features

  • Auto-detects seconds, milliseconds, microseconds and nanoseconds
  • Accepts ISO 8601, RFC 2822, "now" and common date strings
  • ISO (UTC and zoned), RFC 2822, human-readable local and UTC, relative time
  • Epoch in s, ms, µs and ns; weekday, day of year, ISO week, quarter and leap-year flag
  • Any IANA timezone with the current offset and abbreviation
  • Live conversion and a one-click "Use current time"

Timestamp Converter example

Epoch seconds to Riyadh time

Input:

1710498600 · Asia/Riyadh

Output:

Friday, 15 March 2024 at 13:30:00 GMT+3
ISO (UTC): 2024-03-15T10:30:00.000Z
RFC 2822: Fri, 15 Mar 2024 13:30:00 +0300

Frequently asked questions about Timestamp Converter

How does the unit auto-detection work?

By magnitude: values below 10^11 are seconds, below 10^14 milliseconds, below 10^17 microseconds and anything larger nanoseconds. Override it with the unit selector when converting historic or far-future dates.

Which date formats are accepted?

Epoch numbers, ISO 8601 / RFC 3339 (2024-03-15T10:30:00Z, with offsets and fractions), RFC 2822 (Fri, 15 Mar 2024 10:30:00 +0300), the word "now" and most formats the browser can parse.

What timezone is used for strings without an offset?

The timezone selected in the tool (your local zone by default). Add Z or +03:00 to the string to make it unambiguous.

Why is the nanosecond value padded with zeros?

JavaScript dates have millisecond precision. Microsecond and nanosecond outputs are exact multiples of the millisecond value; sub-millisecond digits from your input are not preserved.

Technical notes

All calendar arithmetic uses Intl.DateTimeFormat.formatToParts for the selected zone; offsets are derived by comparing the zoned wall-clock time with the UTC instant, which correctly reflects daylight-saving rules without any bundled timezone database.