Timestamp Converter

Convert Unix seconds, Unix milliseconds, ISO dates, UTC dates, and local browser time without sending timestamps anywhere.

Reference

Timestamp notes

What is Timestamp?

A timestamp is a numeric or textual representation of a specific point in time. Unix timestamps count seconds or milliseconds since January 1, 1970 UTC.

How does the Timestamp tool work?

The timestamp converter detects whether numeric input is likely Unix seconds or Unix milliseconds, converts it to a browser Date object, and displays equivalent UTC, ISO, local, and offset-based representations.

When should you use Timestamp?

  • Debugging log entries that store Unix epoch values
  • Converting API timestamps into readable UTC and local dates
  • Checking scheduled event times across timezone offsets
  • Preparing sample timestamps for tests and documentation

What are the limitations of Timestamp?

  • Timezone names are not resolved from location names
  • Very old or far future dates may depend on browser Date behavior
  • Relative time is approximate and rounded to days

Timestamp examples

seconds 1717243200 -> 2024-06-01T12:00:00.000Z
milliseconds 1717243200000 -> 2024-06-01T12:00:00.000Z
iso 2026-06-30T10:00:00Z -> Unix seconds and local time
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