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Milisegundos a fecha

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

Milliseconds → date & time

13 digits is typical today; fractional values are rounded to the nearest millisecond.

Cómo funciona

  1. Epoch milliseconds count milliseconds since 1970-01-01T00:00:00Z, the unit used by Java, JavaScript, .NET and most web APIs. A current value has 13 digits (≈ 1.7 × 10¹²).
  2. The value is rounded to the nearest whole millisecond when it has a fraction (JavaScript Date precision is 1 ms), then decoded to an exact UTC instant.
  3. The same instant is shown in UTC and your local zone, plus the equivalent 10-digit epoch seconds for cross-checking.

Información útil

  • This page always reads input as milliseconds. A 10-digit value like 1700000000 is seconds; feeding it here produces a 1970-era date. Use the Unix Timestamp Converter when the unit is uncertain.
  • UTC and local dates can differ by a day around midnight; both are shown to make that visible instead of surprising.
  • The full JavaScript Date range (±8.64×10¹⁵ ms) is supported; beyond it the value is rejected with an explanation.
Herramientas de marcas de tiempo

Marca de tiempo Unix a fecha

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

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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

Convertidor ISO 8601

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

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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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Preguntas frecuentes

Which systems use millisecond timestamps?
Java, JavaScript, .NET, and most web APIs and log formats. If your value has 13 digits and is around 1.7 trillion, it is almost certainly milliseconds.
Can I enter fractional milliseconds?
You can enter decimals, and the tool rounds to whole milliseconds explicitly. JavaScript Date precision is one millisecond, so finer detail cannot be represented.
Why is the result a day off from my log’s date?
Log viewers often show UTC while you expect local time (or vice versa). The converter shows both UTC and your local zone so the discrepancy is visible instead of confusing.