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Convertidor ISO 8601

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

Parse an ISO 8601 string

Accepted: date-only · T separator · optional seconds and fraction · Z or ±HH:MM offsets.

Build an ISO string

Cómo funciona

  1. ISO 8601 writes one moment as YYYY-MM-DDTHH:MM:SS plus an optional fraction and offset; Z means UTC, and +05:30 means local time 5 h 30 m ahead of UTC.
  2. Parsing: strings with an offset identify one exact instant; the tool normalizes them to UTC, shows the Unix timestamps, and renders the instant in UTC and your local zone.
  3. Building: your date, time and zone are resolved to an instant (daylight saving included), then emitted with that zone’s offset, plus the UTC (Z) form and Unix seconds for cross-checking.

Información útil

  • Offset-less strings (2026-10-28T14:30:00) are shown as written with both the UTC and your-zone interpretations, never silently assumed to be one or the other.
  • Date-only strings (2026-10-28) are reported as dates; the implied midnight zone differs across systems, which the tool states rather than guessing.
  • RFC 3339 is the internet profile of ISO 8601 that APIs actually use; strings like 2026-10-28T14:30:00Z satisfy both standards.
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

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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Fecha a marca de tiempo Unix

Convierte cualquier fecha y hora en segundos y milisegundos de época.

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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

What does the “Z” in an ISO string mean?
Zulu, meaning the string refers to UTC. 2026-10-28T14:30:00Z is 14:30 UTC. A string with +02:00 instead describes local time two hours ahead of UTC; both denote a precise instant.
What if my ISO string has no offset at all?
Then it is ambiguous: 14:30 somewhere, but where? The tool shows it as written and explains that an offset (or Z) is required to pin down an instant, rather than silently assuming one.
Is ISO 8601 the same as RFC 3339?
RFC 3339 is an internet profile of ISO 8601, representing a subset with a fixed layout. Strings like 2026-10-28T14:30:00Z satisfy both specifications.