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Marca de tiempo Unix a fecha

Convierte marcas de tiempo Unix numéricas a fechas legibles con desglose en UTC y local.

Timestamp → date & time

10 digits = seconds · 13 digits = milliseconds (auto-detect explains which it used).

Cómo funciona

  1. A timestamp marks one exact instant; the unit (seconds or milliseconds) tells how finely it counts since 1970-01-01T00:00:00Z.
  2. Auto-detect labels its choice: values under 100,000,000,000 are read as seconds, larger values as milliseconds, and the note under the result tells you which was applied.
  3. The decoded instant is rendered in UTC and in your browser’s local zone, so an instant near midnight is never mistaken for “the wrong day”.

Información útil

  • Negative values decode normally; -1 is one second before the epoch (1969-12-31 23:59:59 UTC).
  • Range limit: ±8,640,000,000,000,000 ms (the JavaScript Date limits, about years −271,821 to 275,760). Values outside are rejected, not wrapped.
  • Fractional seconds are rounded to the nearest millisecond, and the note says so.
Herramientas de marcas de tiempoDestacada

Convertidor de marcas de tiempo Unix

Convierte marcas de tiempo Unix a fechas y fechas a marcas de tiempo en segundos o milisegundos.

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Herramientas de marcas de tiempo

Milisegundos a fecha

Convierte marcas de tiempo de 13 dígitos en milisegundos a fechas legibles.

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Herramientas de marcas de tiempo

Convertidor de marcas de tiempo UTC

Convierte marcas de tiempo Unix directamente a fecha y hora en formato UTC puro.

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Herramientas de marcas de tiempo

Convertidor ISO 8601

Convierte fechas y timestamps a cadenas ISO 8601 estándar y analiza cadenas ISO.

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Preguntas frecuentes

How do I know if my timestamp is seconds or milliseconds?
Count the digits: 10 digits (e.g. 1700000000) is seconds; 13 digits (1700000000000) is milliseconds. Auto-detect states which unit it applied, without silent guessing.
Why does the UTC date differ from the local date?
A timestamp is one instant; local calendars slice it differently. An instant near midnight UTC can be “yesterday” in New York and “tomorrow” in Tokyo. Both views are shown together.
Are negative timestamps supported?
Yes, pre-1970 instants are negative and decode normally; for example, −1 is one second before the epoch (1969-12-31 23:59:59 UTC).